diff --git a/FastReport.Base/BandBase.cs b/FastReport.Base/BandBase.cs
index fe294ef8..eeaa53a2 100644
--- a/FastReport.Base/BandBase.cs
+++ b/FastReport.Base/BandBase.cs
@@ -621,6 +621,12 @@ internal void FixHeightWithComponentsShift(float deltaY)
             }
         }
 
+        /// <inheritdoc/>
+        public override List<ValidationError> Validate()
+        {
+            return new List<ValidationError>();
+        }
+
         /// <inheritdoc/>
         public override void Serialize(FRWriter writer)
         {
diff --git a/FastReport.Base/Barcode/BarcodeDatamatrix.cs b/FastReport.Base/Barcode/BarcodeDatamatrix.cs
index 01f02067..0295af0a 100644
--- a/FastReport.Base/Barcode/BarcodeDatamatrix.cs
+++ b/FastReport.Base/Barcode/BarcodeDatamatrix.cs
@@ -397,6 +397,15 @@ private void Draw(byte[] data, int dataSize, DmParams dm)
 
     private static void MakePadding(byte[] data, int position, int count)
     {
+      // set to ascii mode
+      if ((count > 0) && (position > 0))
+      {
+        if (data[position - 1] != 254)
+            data[position] = 254;
+        position++;
+        count--;
+      }
+
       //already in ascii mode
       if (count <= 0)
         return;
@@ -733,7 +742,7 @@ private static int C40OrTextEncodation(byte[] text, int textOffset, int textLeng
         ptrIn = last0;
         encPtr = last1;
       }
-      if (encPtr / 3 * 2 > dataLength - 2)
+      if (encPtr / 3 * 2 > dataLength - 1)
       {
         return -1;
       }
@@ -744,8 +753,12 @@ private static int C40OrTextEncodation(byte[] text, int textOffset, int textLeng
         data[dataOffset + ptrOut++] = (byte)(a / 256);
         data[dataOffset + ptrOut++] = (byte)a;
       }
-      data[ptrOut++] = (byte)254;
-      i = AsciiEncodation(text, ptrIn, textLength - ptrIn, data, ptrOut, dataLength - ptrOut);
+        i = 0;
+        if (textLength - ptrIn > 0)
+        {
+            data[ptrOut++] = (byte)254;
+            i = AsciiEncodation(text, ptrIn, textLength - ptrIn, data, ptrOut, dataLength - ptrOut);
+        }
       if (i < 0)
         return i;
       return ptrOut + i;
diff --git a/FastReport.Base/Data/JsonConnection/JsonDataSourceConnection.cs b/FastReport.Base/Data/JsonConnection/JsonDataSourceConnection.cs
index 6601a670..985ef68d 100644
--- a/FastReport.Base/Data/JsonConnection/JsonDataSourceConnection.cs
+++ b/FastReport.Base/Data/JsonConnection/JsonDataSourceConnection.cs
@@ -28,6 +28,7 @@ public partial class JsonDataSourceConnection : DataConnectionBase
         private JsonArray jsonInternal = null;
         private JsonSchema jsonSchema = null;
         private string jsonSchemaString = "";
+        private bool simpleStructure;
 
         #endregion Private Fields
 
@@ -53,6 +54,14 @@ internal JsonSchema JsonSchema
             }
         }
 
+        internal bool SimpleStructure
+        {
+            get
+            {
+                return simpleStructure;
+            }
+        }
+
         #endregion Internal Properties
 
         #region Public Constructors
@@ -182,6 +191,7 @@ private void InitConnection()
         private void InitConnection(bool rebuildSchema)
         {
             JsonDataSourceConnectionStringBuilder builder = new JsonDataSourceConnectionStringBuilder(ConnectionString);
+            simpleStructure = builder.SimpleStructure;
             JsonBase obj = null;
             string jsonText = builder.Json.Trim();
             if (jsonText.Length > 0)
diff --git a/FastReport.Base/Data/JsonConnection/JsonDataSourceConnectionStringBuilder.cs b/FastReport.Base/Data/JsonConnection/JsonDataSourceConnectionStringBuilder.cs
index b5d83b51..53960dc1 100644
--- a/FastReport.Base/Data/JsonConnection/JsonDataSourceConnectionStringBuilder.cs
+++ b/FastReport.Base/Data/JsonConnection/JsonDataSourceConnectionStringBuilder.cs
@@ -67,6 +67,8 @@ public string JsonSchema
             }
         }
 
+
+
         /// <summary>
         /// Gets or sets json url encoding
         /// </summary>
@@ -85,7 +87,102 @@ public string Encoding
             }
         }
 
-        public Dictionary<string, string> Headers { get; set; }
+        /// <summary>
+        /// Set or get headers of the connection string.
+        /// 
+        /// </summary>
+        /// <remarks>
+        /// Returns copy of dictionary. If you need to update values, set the dictionary again!
+        /// </remarks>
+        public Dictionary<string, string> Headers
+        {
+            get
+            {
+                var numberformat = CultureInfo.InvariantCulture.NumberFormat;
+                Dictionary<string, string> headers = new Dictionary<string, string>();
+                object result;
+                string header = string.Empty;
+                string[] splittedHeader;
+                int headerIteration = 0;
+                while (TryGetValue("Header" + headerIteration.ToString(numberformat), out result) && result != null)
+                {
+                    header = (string)result;
+
+                    if (!string.IsNullOrWhiteSpace(header))
+                    {
+                        splittedHeader = header.Split(':');
+
+                        string headerKey = splittedHeader[0], headerVal = splittedHeader[1];
+
+                        if (Regex.IsMatch(headerKey, @"^([A-Za-z0-9+\/]{4})*([A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{2}==)?$"))
+                        {
+                            var base64str = Convert.FromBase64String(headerKey);
+                            headerKey = System.Text.Encoding.UTF8.GetString(base64str);
+                        }
+
+                        if (Regex.IsMatch(headerVal, @"^([A-Za-z0-9+\/]{4})*([A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{2}==)?$"))
+                        {
+                            var base64str = Convert.FromBase64String(headerVal);
+                            headerVal = System.Text.Encoding.UTF8.GetString(base64str);
+                        }
+
+                        headers[headerKey] = headerVal;
+                    }
+                    headerIteration++;
+                }
+                return headers;
+            }
+            set
+            {
+                var numberformat = CultureInfo.InvariantCulture.NumberFormat;
+                int headerIteration = 0;
+
+                while (Remove("Header" + headerIteration.ToString(numberformat)))
+                {
+                    headerIteration++;
+                }
+
+                if (value != null)
+                {
+                    headerIteration = 0;
+                    foreach (var header in value)
+                    {
+                        var headerKey = header.Key;
+                        var headerVal = header.Value;
+                        if (headerKey.Contains(":"))
+                        {
+                            headerKey = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(headerKey));
+                        }
+
+                        if (headerVal.Contains(":"))
+                        {
+                            headerVal = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(headerVal));
+                        }
+
+                        base["Header" + headerIteration.ToString(numberformat)] = headerKey + ":" + headerVal;
+                        headerIteration++;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets simple structure value
+        /// </summary>
+        public bool SimpleStructure
+        {
+            get
+            {
+                object result;
+                if (TryGetValue("SimpleStructure", out result) && result != null)
+                    return result.ToString().ToLower() == "true";
+                return false;
+            }
+            set
+            {
+                base["SimpleStructure"] = value ? "true" : "false";
+            }
+        }
 
 
 
@@ -99,7 +196,6 @@ public string Encoding
         public JsonDataSourceConnectionStringBuilder()
         {
             ConnectionString = "";
-            Headers = new Dictionary<string, string>();
         }
 
         /// <summary>
@@ -111,76 +207,8 @@ public JsonDataSourceConnectionStringBuilder(string connectionString)
             : base()
         {
             ConnectionString = connectionString;
-            Headers = new Dictionary<string, string>();
-            //while (ConnectionString.Contains("Header="))
-            //{
-            object result;
-            string header = string.Empty;
-            string[] splittedHeader;
-            int headerIteration = 0;
-            while (TryGetValue("Header" + headerIteration.ToString(CultureInfo.InvariantCulture.NumberFormat), out result) && result != null)
-            {
-                header = (string)result;
-
-                if (!string.IsNullOrWhiteSpace(header))
-                {
-                    splittedHeader = header.Split(':');
-
-                    string headerKey = splittedHeader[0], headerVal = splittedHeader[1];
-
-                    if (Regex.IsMatch(headerKey, @"^([A-Za-z0-9+\/]{4})*([A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{2}==)?$"))
-                    {
-                        var base64str = Convert.FromBase64String(headerKey);
-                        headerKey = System.Text.Encoding.UTF8.GetString(base64str);
-                    }
-
-                    if (Regex.IsMatch(headerVal, @"^([A-Za-z0-9+\/]{4})*([A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{2}==)?$"))
-                    {
-                        var base64str = Convert.FromBase64String(headerVal);
-                        headerVal = System.Text.Encoding.UTF8.GetString(base64str);
-                    }
-
-                    Headers.Add(headerKey, headerVal);
-                    //ConnectionString = ConnectionString.Replace(header, string.Empty);
-                }
-
-                headerIteration++;
-            }
-            //}
         }
 
         #endregion Public Constructors
-
-        // escape / ; " :
-        public override string ToString()
-        {
-            //TODO: do via stringbuilder
-            //string connString = $"Json={Json};JsonSchema={JsonSchema};Encoding={Encoding}";
-            StringBuilder builder = new StringBuilder();
-            builder.Append("Json=").Append(Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(Json)))
-                .Append(";JsonSchema=").Append(Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(JsonSchema)))
-                .Append(";Encoding=").Append(Encoding);
-            //string connString = "Json=" + Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(Json))
-            //    + ";JsonSchema=" + Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(JsonSchema)) + ";Encoding=" + Encoding;
-            int headerIteration = 0;
-            foreach (var header in Headers)
-            {
-                var headerKey = header.Key;
-                var headerVal = header.Value;
-                if (headerKey.Contains(";") || headerKey.Contains(":") || headerKey.Contains("\"") || headerKey.Contains("\'"))
-                {
-                    headerKey = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(headerKey));
-                }
-
-                if (headerVal.Contains(";") || headerVal.Contains(":") || headerVal.Contains("\"") || headerVal.Contains("\'"))
-                {
-                    headerVal = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(headerVal));
-                }
-
-                builder.Append(";Header").Append(headerIteration.ToString(CultureInfo.InvariantCulture.NumberFormat)).Append("=").Append(headerKey).Append(":").Append(headerVal);
-                //connString += ";Header" + headerIteration + "=" + headerKey + ":" + headerVal;
-            }
-            return builder.ToString();
-        }
     }
 }
\ No newline at end of file
diff --git a/FastReport.Base/Data/JsonConnection/JsonTableDataSource.cs b/FastReport.Base/Data/JsonConnection/JsonTableDataSource.cs
index bdf63806..40f9c8cc 100644
--- a/FastReport.Base/Data/JsonConnection/JsonTableDataSource.cs
+++ b/FastReport.Base/Data/JsonConnection/JsonTableDataSource.cs
@@ -1,8 +1,10 @@
 using FastReport.Data.ElasticSearch;
 using FastReport.Data.JsonConnection.JsonParser;
+using FastReport.Utils;
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.ComponentModel;
 
 namespace FastReport.Data.JsonConnection
 {
@@ -15,6 +17,8 @@ public class JsonTableDataSource : TableDataSource
 
         private JsonArray _json;
         private bool updateSchema;
+        private bool simpleStructure;
+        private string tableData;
 
         #endregion Private Fields
 
@@ -23,6 +27,7 @@ public class JsonTableDataSource : TableDataSource
         /// <summary>
         /// Gets or sets value for force update schema on init schema
         /// </summary>
+        [Browsable(false)]
         public bool UpdateSchema
         {
             get
@@ -34,6 +39,41 @@ public bool UpdateSchema
                 updateSchema = value;
             }
         }
+        /// <summary>
+        /// Get or sets simplify mode for array types
+        /// </summary>
+        [Browsable(false)]
+        public bool SimpleStructure
+        {
+            get
+            {
+                return simpleStructure;
+            }
+
+            set
+            {
+                simpleStructure = value;
+            }
+        }
+
+        /// <inheritdoc />
+        [Browsable(false)]
+        public override string TableData
+        {
+            get
+            {
+                if (String.IsNullOrEmpty(tableData))
+                {
+                    tableData = Json.ToString();
+                }
+                return tableData;
+            }
+
+            set
+            {
+                tableData = value;
+            }
+        }
 
         #endregion Public Properties
 
@@ -45,7 +85,14 @@ internal JsonArray Json
             {
                 if (_json == null)
                 {
-                    _json = GetJson(Parent, this) as JsonArray;
+                    if (StoreData && !String.IsNullOrEmpty(tableData))
+                    {
+                        _json = JsonBase.FromString(tableData) as JsonArray;
+                    }
+                    else
+                    {
+                        _json = GetJson(Parent, this) as JsonArray;
+                    }
                     if (_json == null)
                         _json = new JsonArray();
                 }
@@ -101,13 +148,14 @@ public override void InitializeComponent()
         /// <inheritdoc/>
         public override void InitSchema()
         {
-            if (Columns.Count == 0 || UpdateSchema)
+            if (Columns.Count == 0 || UpdateSchema && !StoreData)
             {
+
                 if (Connection is JsonDataSourceConnection)
                 {
                     JsonDataSourceConnection con = Connection as JsonDataSourceConnection;
 
-                    InitSchema(this, con.JsonSchema);
+                    InitSchema(this, con.JsonSchema, con.SimpleStructure);
                 }
             }
             UpdateSchema = false;
@@ -117,7 +165,8 @@ public override void InitSchema()
         public override void LoadData(ArrayList rows)
         {
             Json = null;
-            if ( rows != null)
+            // JSON is calculated property, no problem with null
+            if (rows != null && Json != null)
             {
                 rows.Clear();
                 int count = Json.Count;
@@ -136,13 +185,25 @@ internal static object GetJsonBaseByColumn(Base parentColumn, Column column)
         {
             if (parentColumn is JsonTableDataSource)
             {
-                switch (column.PropName)
+                JsonTableDataSource jsonTableDataSource = parentColumn as JsonTableDataSource;
+                if (jsonTableDataSource.SimpleStructure)
                 {
-                    case "item":
-                        return (parentColumn as JsonTableDataSource).Json[(parentColumn as JsonTableDataSource).CurrentIndex];
+                    if (!String.IsNullOrEmpty(column.PropName))
+                    {
+                        var obj = (parentColumn as JsonTableDataSource).Json[(parentColumn as JsonTableDataSource).CurrentIndex];
+                        return (obj as JsonBase)[column.PropName];
+                    }
+                }
+                else
+                {
+                    switch (column.PropName)
+                    {
+                        case "item":
+                            return (parentColumn as JsonTableDataSource).Json[(parentColumn as JsonTableDataSource).CurrentIndex];
+                    }
+                    JsonTableDataSource source = column as JsonTableDataSource;
+                    return source.Json;
                 }
-                JsonTableDataSource source = column as JsonTableDataSource;
-                return source.Json;
             }
             if (parentColumn is Column && !String.IsNullOrEmpty(column.PropName))
             {
@@ -175,7 +236,7 @@ internal static object GetValueByColumn(Base parentColumn, Column column)
             return json;
         }
 
-        internal static void InitSchema(Column table, JsonSchema schema)
+        internal static void InitSchema(Column table, JsonSchema schema, bool simpleStructure)
         {
             List<Column> saveColumns = new List<Column>();
             switch (schema.Type)
@@ -191,7 +252,7 @@ internal static void InitSchema(Column table, JsonSchema schema)
                             c.PropName = kv.Key;
                             c.DataType = kv.Value.DataType;
                             c = UpdateColumn(table, c, saveColumns);
-                            InitSchema(c, kv.Value);
+                            InitSchema(c, kv.Value, simpleStructure);
                         }
                         else if (kv.Value.Type == "array")
                         {
@@ -201,7 +262,9 @@ internal static void InitSchema(Column table, JsonSchema schema)
                             c.PropName = kv.Key;
                             c.DataType = kv.Value.DataType;
                             c = UpdateColumn(table, c, saveColumns);
-                            InitSchema(c, kv.Value);
+
+                            InitSchema(c, kv.Value, simpleStructure);
+
                         }
                         else
                         {
@@ -218,6 +281,26 @@ internal static void InitSchema(Column table, JsonSchema schema)
 
                 case "array":
                     JsonSchema items = schema.Items;
+
+                    bool simpleArray = false;
+
+                    if (table is JsonTableDataSource)
+                    {
+                        JsonTableDataSource jsonTableDataSource = table as JsonTableDataSource;
+                        simpleArray = jsonTableDataSource.SimpleStructure =
+                            simpleStructure & items.Type == "object";
+                    }
+
+                    if (simpleArray)
+                    {
+                        // remake schema in simplify mode
+                        InitSchema(table, items, simpleStructure);
+                        // and return, no need to clear column data
+                        // in this case this method has no control to columns
+                        return;
+                    }
+
+
                     {
                         Column c = new Column();
                         c.Name = "index";
@@ -227,6 +310,8 @@ internal static void InitSchema(Column table, JsonSchema schema)
                         UpdateColumn(table, c, saveColumns);
                     }
 
+
+
                     {
                         Column c;
                         bool iSchema = false;
@@ -254,7 +339,7 @@ internal static void InitSchema(Column table, JsonSchema schema)
                         c = UpdateColumn(table, c, saveColumns);
 
                         if (iSchema)
-                            InitSchema(c, items);
+                            InitSchema(c, items, simpleStructure);
                     }
 
                     {
@@ -265,6 +350,7 @@ internal static void InitSchema(Column table, JsonSchema schema)
                         c.DataType = typeof(JsonBase);
                         UpdateColumn(table, c, saveColumns);
                     }
+
                     break;
             }
 
@@ -280,7 +366,7 @@ internal static void InitSchema(Column table, JsonSchema schema)
 
         internal object GetJson(Base parentColumn, Column column)
         {
-            if(parentColumn is ESDataSourceConnection)
+            if (parentColumn is ESDataSourceConnection)
                 parentColumn = (parentColumn as ESDataSourceConnection).GetParentJTDSByName(column.Name);
             if (parentColumn is JsonDataSourceConnection)
             {
@@ -292,7 +378,19 @@ internal object GetJson(Base parentColumn, Column column)
                 if (parentColumn.Parent is ESDataSourceConnection)
                     parentColumn.Parent = (parentColumn.Parent as ESDataSourceConnection).GetParentJTDSByName(parentColumn.Name);
                 JsonTableDataSource source = parentColumn as JsonTableDataSource;
-                return source.Json[source.CurrentRowNo] as object;
+
+                if (source.SimpleStructure)
+                {
+                    object parentJson = source.Json[source.CurrentRowNo];
+                    if (parentJson is JsonBase && !String.IsNullOrEmpty(column.PropName))
+                    {
+                        return (parentJson as JsonBase)[column.PropName];
+                    }
+                }
+                else
+                {
+                    return source.Json[source.CurrentRowNo] as object;
+                }
             }
             else if (parentColumn is Column)
             {
@@ -353,5 +451,17 @@ private static Column UpdateColumn(Column table, Column c, List<Column> list)
         }
 
         #endregion Private Methods
+
+
+        ///  <inheritdoc/>
+        public override void Serialize(FRWriter writer)
+        {
+            base.Serialize(writer);
+
+            if (SimpleStructure)
+            {
+                writer.WriteBool("SimpleStructure", SimpleStructure);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/FastReport.Base/Data/TableDataSource.cs b/FastReport.Base/Data/TableDataSource.cs
index 86c969ab..5ab3d0f1 100644
--- a/FastReport.Base/Data/TableDataSource.cs
+++ b/FastReport.Base/Data/TableDataSource.cs
@@ -126,7 +126,7 @@ public bool StoreData
         /// This property is for internal use only.
         /// </remarks>
         [Browsable(false)]
-        public string TableData
+        public virtual string TableData
         {
             get
             {
diff --git a/FastReport.Base/Export/Html/HTMLExportDraw.cs b/FastReport.Base/Export/Html/HTMLExportDraw.cs
index 15c65425..67126011 100644
--- a/FastReport.Base/Export/Html/HTMLExportDraw.cs
+++ b/FastReport.Base/Export/Html/HTMLExportDraw.cs
@@ -65,8 +65,10 @@ private string HTMLBorderWidthPx(BorderLine line)
             float width;
             if (line.Style == LineStyle.Double)
                 width = line.Width * 3 * Zoom;
-            else
+            else if (layers)
                 width = line.Width * Zoom;
+            else
+                width = line.Width;
 
             return ExportUtils.FloatToString(width) + "px;";
         }
diff --git a/FastReport.Base/Export/Html/HTMLExportLayers.cs b/FastReport.Base/Export/Html/HTMLExportLayers.cs
index c9cfdddd..7423f12e 100644
--- a/FastReport.Base/Export/Html/HTMLExportLayers.cs
+++ b/FastReport.Base/Export/Html/HTMLExportLayers.cs
@@ -565,19 +565,19 @@ private string GetLayerPicture(ReportComponentBase obj, out float Width, out flo
 
                             BorderLines oldLines = obj.Border.Lines;
                             obj.Border.Lines = BorderLines.None;
-                            obj.Draw(new FRPaintEventArgs(g, Zoom + zoom - 1, Zoom + zoom - 1, Report.GraphicCache));
+                            obj.Draw(new FRPaintEventArgs(g, Zoom * zoom, Zoom * zoom, Report.GraphicCache));
                             obj.Border.Lines = oldLines;
                         }
                         if(Width > 0 && Height > 0)
                             using (Bitmap b = new Bitmap(
-                            (int)(Math.Abs(Math.Round(Width * Zoom * zoom))),
-                            (int)(Math.Abs(Math.Round(Height * Zoom * zoom)))
+                            (int)(Math.Abs(Math.Round(Width * Zoom))),
+                            (int)(Math.Abs(Math.Round(Height * Zoom)))
                             ))
                             {
                                 using (Graphics gr = Graphics.FromImage(b))
                                 {
                                     gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
-                                    gr.DrawImage(image, 0, 0, (int)Width * Zoom * zoom, (int)Height * Zoom * zoom);
+                                    gr.DrawImage(image, 0, 0, (int)Width * Zoom, (int)Height * Zoom);
                                 }
 
                                 if (FPictureFormat == System.Drawing.Imaging.ImageFormat.Jpeg)
@@ -612,6 +612,7 @@ private string GetLayerPicture(ReportComponentBase obj, out float Width, out flo
                                 }        
                             }   
 #else
+
                             hash = Crypter.ComputeHash(PictureStream);
                             PictureStream.Position = 0;
 #endif
diff --git a/FastReport.Base/Import/DevExpress/DevExpressImport.cs b/FastReport.Base/Import/DevExpress/DevExpressImport.cs
index 46a84d01..1a42c0f2 100644
--- a/FastReport.Base/Import/DevExpress/DevExpressImport.cs
+++ b/FastReport.Base/Import/DevExpress/DevExpressImport.cs
@@ -1011,11 +1011,24 @@ private void LoadReport()
 
         #region Public Methods
 
+        /// <inheritdoc />
         public override void LoadReport(Report report, string filename)
+        {
+            using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read))
+            {
+                LoadReport(report, fs);
+            }
+        }
+
+        /// <inheritdoc />
+        public override void LoadReport(Report report, Stream content)
         {
             Report = report;
             Report.Clear();
-            devText = File.ReadAllText(filename);
+            using(var sr = new StreamReader(content))
+            {
+                devText = sr.ReadToEnd();
+            }
             try
             {
                 devDoc = new System.Xml.XmlDocument();
diff --git a/FastReport.Base/Import/ImportBase.cs b/FastReport.Base/Import/ImportBase.cs
index 4c1467e5..f9aef857 100644
--- a/FastReport.Base/Import/ImportBase.cs
+++ b/FastReport.Base/Import/ImportBase.cs
@@ -1,3 +1,5 @@
+using System.IO; 
+
 namespace FastReport.Import
 {
     /// <summary>
@@ -57,6 +59,16 @@ public virtual void LoadReport(Report report, string filename)
             report.Clear();
         }
 
+        /// <summary>
+        /// Loads the specified file into specified report from stream.
+        /// </summary>
+        /// <param name="report">Report object</param>
+        /// <param name="content">File stream</param>
+        public virtual void LoadReport(Report report, Stream content)
+        {
+            report.Clear();
+        }
+
         #endregion // Public Methods
     }
 }
diff --git a/FastReport.Base/Import/ListAndLabel/ListAndLabelImport.cs b/FastReport.Base/Import/ListAndLabel/ListAndLabelImport.cs
index a2172f2d..29229eb4 100644
--- a/FastReport.Base/Import/ListAndLabel/ListAndLabelImport.cs
+++ b/FastReport.Base/Import/ListAndLabel/ListAndLabelImport.cs
@@ -413,7 +413,19 @@ private void LoadReport()
         ///<inheritdoc/>
         public override void LoadReport(Report report, string filename)
         {
-            textLL = File.ReadAllText(filename);
+            using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read))
+            {
+                LoadReport(report, fs);
+            }
+        }
+
+        /// <inheritdoc />
+        public override void LoadReport(Report report, Stream content)
+        {
+            using(var sr = new StreamReader(content))
+            {
+                textLL = sr.ReadToEnd();
+            }
             isListAndLabelReport = CheckIsListAndLabelReport();
             if (isListAndLabelReport)
             {
diff --git a/FastReport.Base/Import/RDL/RDLImport.cs b/FastReport.Base/Import/RDL/RDLImport.cs
index f2c29ac2..d162809f 100644
--- a/FastReport.Base/Import/RDL/RDLImport.cs
+++ b/FastReport.Base/Import/RDL/RDLImport.cs
@@ -926,11 +926,19 @@ private void LoadReport(XmlNode reportNode)
         public override void LoadReport(Report report, string filename)
         {
             this.filename = filename;
+            using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read))
+            {
+                LoadReport(report, fs);
+            }
+        }
+        /// <inheritdoc />
+        public override void LoadReport(Report report, Stream content)
+        {
             Report = report;
             Report.Clear();
-            XmlDocument doc = new XmlDocument();
-            doc.Load(filename);
-            reportNode = doc.LastChild;
+            XmlDocument document = new XmlDocument();
+            document.Load(content);
+            reportNode = document.LastChild;
             defaultFontFamily = "";
             page = null;
             LoadReport(reportNode);
diff --git a/FastReport.Base/PictureObjectBase.cs b/FastReport.Base/PictureObjectBase.cs
index 2993530d..7c57e471 100644
--- a/FastReport.Base/PictureObjectBase.cs
+++ b/FastReport.Base/PictureObjectBase.cs
@@ -820,7 +820,7 @@ protected void UpdateAutoSize()
             {
                 if (ImageWidth == 0 || ImageHeight == 0)
                 {
-                    if (IsRunning)
+                    if (IsRunning && !IsPrinting)
                     {
                         Width = 0;
                         Height = 0;
diff --git a/FastReport.Base/ReportComponentBase.cs b/FastReport.Base/ReportComponentBase.cs
index fbf864ea..b55624a2 100644
--- a/FastReport.Base/ReportComponentBase.cs
+++ b/FastReport.Base/ReportComponentBase.cs
@@ -792,6 +792,29 @@ public virtual bool IsVisible(FRPaintEventArgs e)
             return e.Graphics.IsVisible(objRect);
         }
 
+        /// <summary>
+        /// Validate this object.
+        /// </summary>
+        /// <returns>List of errors</returns>
+        public virtual List<ValidationError> Validate()
+        {
+            List<ValidationError> listError = new List<ValidationError>();
+
+            if (IsIntersectingWithOtherObject && !(Parent is ReportComponentBase && !Validator.RectContainInOtherRect((Parent as ReportComponentBase).AbsBounds, this.AbsBounds)))
+                listError.Add(new ValidationError(Name, ValidationError.ErrorLevel.Warning, Res.Get("Messages,Validator,IntersectedObjects"), this));
+
+            if (Height <= 0 || Width <= 0)
+                listError.Add(new ValidationError(Name, ValidationError.ErrorLevel.Error, Res.Get("Messages,Validator,IncorrectSize"), this));
+
+            if (Name == "")
+                listError.Add(new ValidationError(Name, ValidationError.ErrorLevel.Error, Res.Get("Messages,Validator,UnnamedObject"), this));
+
+            if (Parent is ReportComponentBase && !Validator.RectContainInOtherRect((Parent as ReportComponentBase).AbsBounds, this.AbsBounds))
+                listError.Add(new ValidationError(Name, ValidationError.ErrorLevel.Error, Res.Get("Messages,Validator,OutOfBounds"), this));
+
+            return listError;
+        }
+
         /// <inheritdoc/>
         public override void Serialize(FRWriter writer)
         {
diff --git a/FastReport.Base/Utils/Validator.cs b/FastReport.Base/Utils/Validator.cs
index c1f978a3..d243003d 100644
--- a/FastReport.Base/Utils/Validator.cs
+++ b/FastReport.Base/Utils/Validator.cs
@@ -1,8 +1,33 @@
 using System;
+using System.Collections.Generic;
 using System.Drawing;
+using System.Linq;
 
 namespace FastReport.Utils
 {
+
+    public struct ValidationError
+    {
+        public enum ErrorLevel
+        {
+            Warning,
+            Error
+        }
+
+        public string Name;
+        public ErrorLevel Level;
+        public string Message;
+        public ReportComponentBase Object;
+
+        public ValidationError(string name, ErrorLevel level, string message, ReportComponentBase obj)
+        {
+            this.Name = name;
+            this.Level = level;
+            this.Message = message;
+            this.Object = obj;
+        }
+    } 
+
     /// <summary>
     /// Contains methods used for validation of report.
     /// </summary>
@@ -43,9 +68,57 @@ static public bool ValidateIntersectionAllObjects(BandBase band)
             return result;
         }
 
+        /// <summary>
+        /// Check child rectangle on contains in parent rectangle.
+        /// </summary>
+        /// <param name="parent"></param>
+        /// <param name="child"></param>
+        /// <returns></returns>
+        static public bool RectContainInOtherRect(RectangleF parent, RectangleF child)
+        {
+            return parent.Contains(GetReducedRect(child));
+        }
+
         private static RectangleF GetReducedRect(RectangleF rect)
         {
             return new RectangleF(rect.X + 0.01f, rect.Y + 0.01f, rect.Width - 0.02f, rect.Height - 0.02f);
         }
+
+        static public List<ValidationError> ValidateReport(Report report)
+        {
+            if (report == null)
+                return null;
+            List<ValidationError> listError = new List<ValidationError>();
+
+            foreach (PageBase page in report.Pages)
+            {
+                foreach (Base c in page.AllObjects)
+                {
+                    if (c is ReportComponentBase)
+                        listError.AddRange((c as ReportComponentBase).Validate());
+
+                    if (c is BandBase)
+                        ValidateIntersectionAllObjects(c as BandBase);
+                }
+            }
+
+            bool duplicateName;
+            for (int i = 0; i < report.AllObjects.Count - 1; i++)
+            {
+                duplicateName = false;
+                for (int j = i + 1; j < report.AllObjects.Count; j++)
+                {
+                    if (report.AllObjects[j] is ReportComponentBase && report.AllObjects[i].Name == report.AllObjects[j].Name)
+                    {
+                        listError.Add(new ValidationError(report.AllObjects[j].Name, ValidationError.ErrorLevel.Error, Res.Get("Messages,Validator,DuplicateName"), (ReportComponentBase)report.AllObjects[j]));
+                        duplicateName = true;
+                    }
+                }
+                if(report.AllObjects[i] is ReportComponentBase && duplicateName)
+                    listError.Add(new ValidationError(report.AllObjects[i].Name, ValidationError.ErrorLevel.Error, Res.Get("Messages,Validator,DuplicateName"), (ReportComponentBase)report.AllObjects[i]));
+            }
+
+            return listError.Distinct().ToList();
+        }
     } 
 }
\ No newline at end of file
diff --git a/FastReport/Resources/en.xml b/FastReport/Resources/en.xml
index 9c343672..38b238f4 100644
--- a/FastReport/Resources/en.xml
+++ b/FastReport/Resources/en.xml
@@ -69,6 +69,13 @@
     <ErrorInHighlightCondition Text="Error in highlight condition"/>
     <FileNameEmpty Text="Please specify the correct file name."/>
     <SaveToAnotherFile Text="Would you like to save to another file?"/>
+    <Validator>
+      <DuplicateName Text="Name already is used."/>
+      <IntersectedObjects Text="Object is intersected with other object."/>
+      <IncorrectSize Text="Object must have sizes more than zero."/>
+      <UnnamedObject Text="Object hasn't name."/>
+      <OutOfBounds Text="Object out beyond boundaries of parent."/>
+    </Validator>
     <Swiss>
       <SwissNullIban Text="Iban must not be null"/>
       <SwissNullCreditor Text="Creditor must not be null"/>
@@ -491,6 +498,11 @@
         <EventsTab Text="Events"/>
         <NObjectsSelected Text="{0} objects selected"/>
       </Properties>
+      <Validator Text="Validation">
+        <Name Text="Name"/>
+        <Message Text="Message"/>
+        <Refresh Text="Refresh"/>
+      </Validator>
       <ReportTree Text="Report Tree"/>
       <CollapseAll Text="Collapse all"/>
       <ExpandAll Text="Expand all"/>
@@ -2276,6 +2288,7 @@
       <HeaderKey Text="Header"/>
       <HeaderVal Text="Value"/>
       <ConfirmChanges Text="Json has been modified. Generate a new schema?" />
+      <SimpleStructure Text="Simple structure"/>
     </Json>
     <MongoDB>
       <Scheme Text="Scheme:"/>
diff --git a/Localization/Russian.frl b/Localization/Russian.frl
index c7def221..9cc95798 100644
--- a/Localization/Russian.frl
+++ b/Localization/Russian.frl
@@ -69,6 +69,13 @@
     <ErrorInHighlightCondition Text="Ошибка в условном выделении"/>
     <FileNameEmpty Text="Пожалуйста, укажите имя файла."/>
     <SaveToAnotherFile Text="Хотите сохранить в другой файл?"/>
+    <Validator>
+      <DuplicateName Text="Имя уже используется."/>
+      <IntersectedObjects Text="Объект пересекается с другим объектом."/>
+      <IncorrectSize Text="Объект должен иметь размеры больше нулевых."/>
+      <UnnamedObject Text="Объект не имеет имени."/>
+      <OutOfBounds Text="Объект выходит за границы родительского элемента."/>
+    </Validator>
     <Swiss>
       <SwissNullIban Text="IBAN не должен быть null"/>
       <SwissNullCreditor Text="Плательщик не должен быть NULL"/>
@@ -473,9 +480,9 @@
         <CloseAll Text="Закрыть все"/>
       </Window>
       <Help Text="Справка">
-		  <Contents Text="Содержание..."/>
-		  <About Text="О программе..."/>
-		  <Account Text="Учётная запись"/>
+        <Contents Text="Содержание..."/>
+        <About Text="О программе..."/>
+        <Account Text="Учётная запись"/>
       </Help>
     </Menu>
     <ToolWindow>
@@ -486,6 +493,11 @@
         <EventsTab Text="События"/>
         <NObjectsSelected Text="{0} объектов выбрано"/>
       </Properties>
+      <Validator Text="Проверка">
+        <Name Text="Имя"/>
+        <Message Text="Сообщение"/>
+        <Refresh Text="Обновить"/>
+      </Validator>
       <ReportTree Text="Дерево отчета"/>
       <CollapseAll Text="Свернуть все"/>
       <ExpandAll Text="Развернуть все"/>
@@ -2062,6 +2074,7 @@
       <HeaderKey Text="Заголовок"/>
       <HeaderVal Text="Значение"/>
       <ConfirmChanges Text="Json был изменен. Перестроить схему JSON?" />
+      <SimpleStructure Text="Простая структура"/>
     </Json>
     <MongoDB>
       <Scheme Text="Схема:"/>