errors and warnings

src/advclient/AdvancedClient.java

@@ -2982,7 +2982,7 @@ public void actionPerformed(ActionEvent e) {
                 };
 
                 if (ps.typedAmount <= 0) {
-                    ps.errText = "Invalid amount";
+                    ps.errText = "Transfer must be higher than zero";
                     showScreen();
                     return;  
                 }
@@ -2996,7 +2996,7 @@ public void actionPerformed(ActionEvent e) {
                 ps.typedMemo = ps.typedMemo.trim();
                 if (!ps.typedMemo.isEmpty()) {
                     if (!Validator.memo(ps.typedMemo)) {
-                        ps.errText = "Memo: Non alpha number characters are not allowed";
+                        ps.errText = "Memo: special characters not allowed! Use numbers and letters only";
                         showScreen();
                         return;
                     }
@@ -3049,7 +3049,7 @@ public void actionPerformed(ActionEvent e) {
                     }
 
                     if (ps.typedMemo.isEmpty()) {
-                        ps.errText = "Memo cannot be empty";
+                        ps.errText = " nnot be empty";
                         showScreen();
                         return; 
                     }     
@@ -3067,7 +3067,7 @@ public void actionPerformed(ActionEvent e) {
                     }         
                 } else if (dstIdx == rvTo.idxs.length + 1) {
                     if (!Validator.memo(ps.typedMemo)) {
-                        ps.errText = "Memo cannot contain dots or slashes";
+                        ps.errText = "Memo: special characters not allowed! Use numbers and letters only";
                         showScreen();
                         return;
                     }
@@ -3090,6 +3090,17 @@ public void actionPerformed(ActionEvent e) {
                     if (ps.typedMemo.isEmpty())
                         ps.typedMemo = "Export";
 
+                    String filename = ps.chosenFile + File.separator + ps.typedAmount + ".CloudCoin." + ps.typedMemo + ".stack";
+                    File f = new File(filename);
+                    if (f.exists()) {
+                        ps.errText = "File with the same Memo already exists in "
+                                + ps.chosenFile + " folder. Use different Memo or change folder for your transfer";
+                        showScreen();
+                        return;
+                    }
+
+
+
                     ps.sendType = ProgramState.SEND_TYPE_FOLDER;    
 
                     setActiveWallet(ps.srcWallet);

src/advclient/common/Exporter/Exporter.java

@@ -296,7 +296,7 @@ private boolean exportStack(String dir, String tag) {
         if (f.exists()) {
             logger.error(ltag, "File exists: " + fileName);
             er.status = ExporterResult.STATUS_ERROR;
-            er.errText = "Exported file with the same tag already exist";
+            er.errText = "Exported file with the same tag already exists";
             return false;
         }