diff --git a/macros/REST_OpenInputFile.C b/macros/REST_OpenInputFile.C
index 982cf46cc..1bf55e0a5 100644
--- a/macros/REST_OpenInputFile.C
+++ b/macros/REST_OpenInputFile.C
@@ -7,6 +7,8 @@ void REST_OpenInputFile(const std::string& fileName) {
     if (TRestTools::isRunFile(fileName)) {
         printf("\n%s\n\n", "REST processed file identified. It contains a valid TRestRun.");
         run = new TRestRun(fileName);
+        // print number of entries in the run
+        printf("\nThe run has %lld entries.\n", run->GetEntries());
         printf("\nAttaching TRestRun %s as run...\n", fileName.c_str());
         ana_tree = run->GetAnalysisTree();
         printf("Attaching TRestAnalysisTree as ana_tree...\n");
diff --git a/source/framework/core/inc/TRestHits.h b/source/framework/core/inc/TRestHits.h
index 654b88736..3e6e8c0e3 100644
--- a/source/framework/core/inc/TRestHits.h
+++ b/source/framework/core/inc/TRestHits.h
@@ -63,7 +63,7 @@ class TRestHits {
 
    public:
     void Translate(Int_t n, Double_t x, Double_t y, Double_t z);
-    void RotateIn3D(Int_t n, Double_t alpha, Double_t beta, Double_t gamma, const TVector3& vMean);
+    void RotateIn3D(Int_t n, Double_t alpha, Double_t beta, Double_t gamma, const TVector3& center);
     void Rotate(Int_t n, Double_t alpha, const TVector3& vAxis, const TVector3& vMean);
 
     void AddHit(Double_t x, Double_t y, Double_t z, Double_t en, Double_t t = 0, REST_HitType type = XYZ);
diff --git a/source/framework/core/inc/TRestRun.h b/source/framework/core/inc/TRestRun.h
index ffaf56b41..c927d5880 100644
--- a/source/framework/core/inc/TRestRun.h
+++ b/source/framework/core/inc/TRestRun.h
@@ -84,7 +84,9 @@ class TRestRun : public TRestMetadata {
     void GetEntry(Long64_t entry);
 
     void GetNextEntry() {
-        if (fCurrentEvent + 1 >= GetEntries()) fCurrentEvent = -1;
+        if (fCurrentEvent + 1 >= GetEntries()) {
+            fCurrentEvent = -1;
+        }
         GetEntry(fCurrentEvent + 1);
     }
 
@@ -246,7 +248,7 @@ class TRestRun : public TRestMetadata {
 
     // Constructor & Destructor
     TRestRun();
-    TRestRun(const std::string& filename);
+    explicit TRestRun(const std::string& filename);
     ~TRestRun();
 
     ClassDefOverride(TRestRun, 6);
diff --git a/source/framework/core/src/TRestHits.cxx b/source/framework/core/src/TRestHits.cxx
index b2c4900a8..1e2a642ab 100644
--- a/source/framework/core/src/TRestHits.cxx
+++ b/source/framework/core/src/TRestHits.cxx
@@ -169,7 +169,9 @@ Bool_t TRestHits::isNaN(Int_t n) const {
 ///
 Double_t TRestHits::GetEnergyIntegral() const {
     Double_t sum = 0;
-    for (unsigned int i = 0; i < GetNumberOfHits(); i++) sum += GetEnergy(i);
+    for (unsigned int i = 0; i < GetNumberOfHits(); i++) {
+        sum += GetEnergy(i);
+    }
     return sum;
 }
 
@@ -207,8 +209,11 @@ Double_t TRestHits::GetEnergyInPrism(const TVector3& x0, const TVector3& x1, Dou
                                      Double_t theta) const {
     Double_t energy = 0.;
 
-    for (unsigned int n = 0; n < GetNumberOfHits(); n++)
-        if (isHitNInsidePrism(n, x0, x1, sizeX, sizeY, theta)) energy += this->GetEnergy(n);
+    for (unsigned int n = 0; n < GetNumberOfHits(); n++) {
+        if (isHitNInsidePrism(n, x0, x1, sizeX, sizeY, theta)) {
+            energy += this->GetEnergy(n);
+        }
+    }
 
     return energy;
 }
@@ -416,17 +421,17 @@ void TRestHits::Translate(Int_t n, double x, double y, double z) {
 /// \brief It rotates hit `n` following rotations in Z, Y and X by angles gamma, beta and alpha. The
 /// rotation is performed with center at `vMean`.
 ///
-void TRestHits::RotateIn3D(Int_t n, Double_t alpha, Double_t beta, Double_t gamma, const TVector3& vMean) {
-    TVector3 position = GetPosition(n);
-    TVector3 vHit = position - vMean;
+void TRestHits::RotateIn3D(Int_t n, Double_t alpha, Double_t beta, Double_t gamma, const TVector3& center) {
+    const TVector3 position = GetPosition(n);
+    TVector3 vHit = position - center;
 
     vHit.RotateZ(gamma);
     vHit.RotateY(beta);
     vHit.RotateX(alpha);
 
-    fX[n] = vHit[0] + vMean[0];
-    fY[n] = vHit[1] + vMean[1];
-    fZ[n] = vHit[2] + vMean[2];
+    fX[n] = vHit.X() + center.X();
+    fY[n] = vHit.Y() + center.Y();
+    fZ[n] = vHit.Z() + center.Z();
 }
 
 ///////////////////////////////////////////////
diff --git a/source/framework/core/src/TRestRun.cxx b/source/framework/core/src/TRestRun.cxx
index 3f533206b..d08dba6b2 100644
--- a/source/framework/core/src/TRestRun.cxx
+++ b/source/framework/core/src/TRestRun.cxx
@@ -1617,8 +1617,11 @@ TRestMetadata* TRestRun::GetMetadata(const TString& name, TFile* file) {
             }
         }
     } else {
-        for (unsigned int i = 0; i < fMetadata.size(); i++)
-            if (fMetadata[i]->GetName() == name) return fMetadata[i];
+        for (unsigned int i = 0; i < fMetadata.size(); i++) {
+            if (fMetadata[i]->GetName() == name) {
+                return fMetadata[i];
+            }
+        }
     }
 
     return nullptr;
diff --git a/source/framework/core/src/startup.cpp b/source/framework/core/src/startup.cpp
index 259956073..a4f7e7f41 100644
--- a/source/framework/core/src/startup.cpp
+++ b/source/framework/core/src/startup.cpp
@@ -295,6 +295,7 @@ vector<T> StringToVector(string vec) {
     return result;
 }
 AddConverter(VectorToString, StringToVector, vector<int>);
+AddConverter(VectorToString, StringToVector, vector<UShort_t>);
 AddConverter(VectorToString, StringToVector, vector<float>);
 AddConverter(VectorToString, StringToVector, vector<double>);
 AddConverter(VectorToString, StringToVector, vector<string>);
@@ -433,3 +434,254 @@ AddConverter(MapToString, StringToMap, map<TString comma TString>);
 AddConverter(MapToString, StringToMap, map<TString comma string>);
 
 AddConverter(MapToString, StringToMap, map<TString comma TVector2>);
+
+template <class T, class U>
+string PairToString(pair<T, U> p) {
+    string result = "{";
+    result += Converter<T>::thisptr->ToStringFunc(p.first);
+    result += ",";
+    result += Converter<U>::thisptr->ToStringFunc(p.second);
+    result += "}";
+    return result;
+}
+template <class T, class U>
+pair<T, U> StringToPair(string vec) {
+    pair<T, U> result;
+    if (vec[0] == '{' && vec[vec.size() - 1] == '}') {
+        vec.erase(vec.begin());
+        vec.erase(vec.end() - 1);
+        vector<string> parts = Split(vec, ",");
+
+        if (parts.size() == 2) {
+            while (parts[0][0] == ' ') {
+                parts[0].erase(parts[0].begin());
+            }
+            while (parts[0][parts[0].size() - 1] == ' ') {
+                parts[0].erase(parts[0].end() - 1);
+            }
+            while (parts[1][0] == ' ') {
+                parts[1].erase(parts[1].begin());
+            }
+            while (parts[1][parts[1].size() - 1] == ' ') {
+                parts[1].erase(parts[1].end() - 1);
+            }
+            result.first = Converter<T>::thisptr->ParseStringFunc(parts[0]);
+            result.second = Converter<U>::thisptr->ParseStringFunc(parts[1]);
+        } else {
+            cout << "illegal format!" << endl;
+            return pair<T, U>{};
+        }
+
+    } else {
+        cout << "illegal format!" << endl;
+        return pair<T, U>{};
+    }
+    return result;
+}
+AddConverter(PairToString, StringToPair, pair<int comma int>);
+AddConverter(PairToString, StringToPair, pair<int comma float>);
+AddConverter(PairToString, StringToPair, pair<int comma double>);
+AddConverter(PairToString, StringToPair, pair<UShort_t comma float>);
+AddConverter(PairToString, StringToPair, pair<UShort_t comma double>);
+
+// a vector of pairs
+template <class T, class U>
+string PairVectorToString(vector<pair<T, U>> vec) {
+    stringstream ss;
+    ss << "{";
+    int cont = 0;
+    for (auto const& x : vec) {
+        if (cont > 0) ss << ",";
+        cont++;
+
+        ss << "[";
+        ss << Converter<T>::thisptr->ToStringFunc(x.first);
+        ss << ":";
+        ss << Converter<U>::thisptr->ToStringFunc(x.second);
+        ss << "]";
+    }
+    ss << "}";
+    return ss.str();
+}
+template <class T, class U>
+vector<pair<T, U>> StringToPairVector(string vec) {
+    vector<pair<T, U>> result;
+    // input string format: {[dd:7],[aa:8],[ss:9]}
+    if (vec[0] == '{' && vec[vec.size() - 1] == '}') {
+        vec.erase(vec.begin());
+        vec.erase(vec.end() - 1);
+        vector<string> parts = Split(vec, ",");
+
+        for (string part : parts) {
+            while (part[0] == ' ') {
+                part.erase(part.begin());
+            }
+            while (part[part.size() - 1] == ' ') {
+                part.erase(part.end() - 1);
+            }
+
+            if (part[0] == '[' && part[part.size() - 1] == ']') {
+                part.erase(part.begin());
+                part.erase(part.end() - 1);
+                vector<string> key_value = Split(part, ":");
+                if (key_value.size() == 2) {
+                    T key = Converter<T>::thisptr->ParseStringFunc(key_value[0]);
+                    U value = Converter<U>::thisptr->ParseStringFunc(key_value[1]);
+                    result.push_back(pair<T, U>(key, value));
+                } else {
+                    cout << "illegal format!" << endl;
+                    return vector<pair<T, U>>{};
+                }
+            } else {
+                cout << "illegal format!" << endl;
+                return vector<pair<T, U>>{};
+            }
+        }
+
+    } else {
+        cout << "illegal format!" << endl;
+        return vector<pair<T, U>>{};
+    }
+
+    return result;
+}
+AddConverter(PairVectorToString, StringToPairVector, vector<pair<int comma int>>);
+AddConverter(PairVectorToString, StringToPairVector, vector<pair<int comma float>>);
+AddConverter(PairVectorToString, StringToPairVector, vector<pair<int comma double>>);
+AddConverter(PairVectorToString, StringToPairVector, vector<pair<UShort_t comma float>>);
+AddConverter(PairVectorToString, StringToPairVector, vector<pair<UShort_t comma double>>);
+
+// Implement for triple (tuple)
+template <class T, class U, class V>
+string TripleToString(tuple<T, U, V> t) {
+    string result = "{";
+    result += Converter<T>::thisptr->ToStringFunc(get<0>(t));
+    result += ",";
+    result += Converter<U>::thisptr->ToStringFunc(get<1>(t));
+    result += ",";
+    result += Converter<V>::thisptr->ToStringFunc(get<2>(t));
+    result += "}";
+    return result;
+}
+
+template <class T, class U, class V>
+tuple<T, U, V> StringToTriple(string vec) {
+    tuple<T, U, V> result;
+    if (vec[0] == '{' && vec[vec.size() - 1] == '}') {
+        vec.erase(vec.begin());
+        vec.erase(vec.end() - 1);
+        vector<string> parts = Split(vec, ",");
+
+        if (parts.size() == 3) {
+            while (parts[0][0] == ' ') {
+                parts[0].erase(parts[0].begin());
+            }
+            while (parts[0][parts[0].size() - 1] == ' ') {
+                parts[0].erase(parts[0].end() - 1);
+            }
+            while (parts[1][0] == ' ') {
+                parts[1].erase(parts[1].begin());
+            }
+            while (parts[1][parts[1].size() - 1] == ' ') {
+                parts[1].erase(parts[1].end() - 1);
+            }
+            while (parts[2][0] == ' ') {
+                parts[2].erase(parts[2].begin());
+            }
+            while (parts[2][parts[2].size() - 1] == ' ') {
+                parts[2].erase(parts[2].end() - 1);
+            }
+            get<0>(result) = Converter<T>::thisptr->ParseStringFunc(parts[0]);
+            get<1>(result) = Converter<U>::thisptr->ParseStringFunc(parts[1]);
+            get<2>(result) = Converter<V>::thisptr->ParseStringFunc(parts[2]);
+        } else {
+            cout << "illegal format!" << endl;
+            return tuple<T, U, V>{};
+        }
+
+    } else {
+        cout << "illegal format!" << endl;
+        return tuple<T, U, V>{};
+    }
+    return result;
+}
+
+AddConverter(TripleToString, StringToTriple, tuple<int comma int comma int>);
+AddConverter(TripleToString, StringToTriple, tuple<int comma int comma float>);
+AddConverter(TripleToString, StringToTriple, tuple<int comma int comma double>);
+AddConverter(TripleToString, StringToTriple, tuple<UShort_t comma UShort_t comma int>);
+AddConverter(TripleToString, StringToTriple, tuple<UShort_t comma UShort_t comma float>);
+AddConverter(TripleToString, StringToTriple, tuple<UShort_t comma UShort_t comma double>);
+
+// vector of triple
+template <class T, class U, class V>
+string TripleVectorToString(vector<tuple<T, U, V>> vec) {
+    stringstream ss;
+    ss << "{";
+    int cont = 0;
+    for (auto const& x : vec) {
+        if (cont > 0) ss << ",";
+        cont++;
+
+        ss << "[";
+        ss << Converter<T>::thisptr->ToStringFunc(get<0>(x));
+        ss << ":";
+        ss << Converter<U>::thisptr->ToStringFunc(get<1>(x));
+        ss << ":";
+        ss << Converter<V>::thisptr->ToStringFunc(get<2>(x));
+        ss << "]";
+    }
+    ss << "}";
+    return ss.str();
+}
+
+template <class T, class U, class V>
+vector<tuple<T, U, V>> StringToTripleVector(string vec) {
+    vector<tuple<T, U, V>> result;
+    // input string format: {[dd:7],[aa:8],[ss:9]}
+    if (vec[0] == '{' && vec[vec.size() - 1] == '}') {
+        vec.erase(vec.begin());
+        vec.erase(vec.end() - 1);
+        vector<string> parts = Split(vec, ",");
+
+        for (string part : parts) {
+            while (part[0] == ' ') {
+                part.erase(part.begin());
+            }
+            while (part[part.size() - 1] == ' ') {
+                part.erase(part.end() - 1);
+            }
+
+            if (part[0] == '[' && part[part.size() - 1] == ']') {
+                part.erase(part.begin());
+                part.erase(part.end() - 1);
+                vector<string> key_value = Split(part, ":");
+                if (key_value.size() == 3) {
+                    T key = Converter<T>::thisptr->ParseStringFunc(key_value[0]);
+                    U value = Converter<U>::thisptr->ParseStringFunc(key_value[1]);
+                    V value2 = Converter<V>::thisptr->ParseStringFunc(key_value[2]);
+                    result.push_back(tuple<T, U, V>(key, value, value2));
+                } else {
+                    cout << "illegal format!" << endl;
+                    return vector<tuple<T, U, V>>{};
+                }
+            } else {
+                cout << "illegal format!" << endl;
+                return vector<tuple<T, U, V>>{};
+            }
+        }
+
+    } else {
+        cout << "illegal format!" << endl;
+        return vector<tuple<T, U, V>>{};
+    }
+
+    return result;
+}
+
+AddConverter(TripleVectorToString, StringToTripleVector, vector<tuple<int comma int comma int>>);
+AddConverter(TripleVectorToString, StringToTripleVector, vector<tuple<int comma int comma float>>);
+AddConverter(TripleVectorToString, StringToTripleVector, vector<tuple<int comma int comma double>>);
+AddConverter(TripleVectorToString, StringToTripleVector, vector<tuple<UShort_t comma UShort_t comma int>>);
+AddConverter(TripleVectorToString, StringToTripleVector, vector<tuple<UShort_t comma UShort_t comma float>>);
+AddConverter(TripleVectorToString, StringToTripleVector, vector<tuple<UShort_t comma UShort_t comma double>>);