diff --git a/Lib/scilab/scicontainer.swg b/Lib/scilab/scicontainer.swg
index 1d9dadd34..23c21a3ab 100644
--- a/Lib/scilab/scicontainer.swg
+++ b/Lib/scilab/scicontainer.swg
@@ -43,8 +43,6 @@
 	  fragment="StdTraits",
 	  fragment="SwigSciIterator_T")
 {
-%#include <stdio.h>
-
 namespace swig
 {
   template <class T>
@@ -63,12 +61,7 @@ namespace swig
     {
       try
       {
-        T value;
-        if (traits_asval_sequenceitem<T>::asval(_seq, _piSeqAddr, _index, &value) == SWIG_OK)
-        {
-          return value;
-        }
-        else throw std::invalid_argument("Cannot get sequence item.");
+        return traits_asval_sequenceitem<T>::asval(_seq, _piSeqAddr, _index);
       }
       catch (std::exception& e)
       {
diff --git a/Lib/scilab/scisequence.swg b/Lib/scilab/scisequence.swg
index c580c9e11..e86ecdc0e 100644
--- a/Lib/scilab/scisequence.swg
+++ b/Lib/scilab/scisequence.swg
@@ -34,11 +34,6 @@
 //
 
 %fragment(SWIG_Traits_Sequence_frag(ptr), "header",
-  fragment=SWIG_AsCheck_Sequence_frag(int),
-  fragment=SWIG_AsGet_Sequence_frag(int),
-  fragment=SWIG_AsSize_Sequence_frag(int),
-  fragment=SWIG_FromCreate_Sequence_frag(int),
-  fragment=SWIG_FromSet_Sequence_frag(int),
   fragment=SWIG_AsCheck_Sequence_frag(ptr),
   fragment=SWIG_AsGet_Sequence_frag(ptr),
   fragment=SWIG_AsSize_Sequence_frag(ptr),
@@ -47,30 +42,28 @@
   fragment="StdTraits") {
 
 namespace swig {
-  // For sequence of values, considers int as default type (so it works for enums)
-
+  // Error returned for sequence containers of default item type
   template <typename T> struct traits_as_sequence {
     static int check(SwigSciObject obj) {
-      return SWIG_AsCheck_Sequence_dec(int)(obj);
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
     static int get(SwigSciObject obj, void **sequence) {
-      return SWIG_AsGet_Sequence_dec(int)(obj, (int **)sequence);
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
     static int size(SwigSciObject obj, int *size) {
-      return SWIG_AsSize_Sequence_dec(int)(obj, size);
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
   };
   template <typename T> struct traits_from_sequence {
     static int create(int size, void **sequence) {
-      return SWIG_FromCreate_Sequence_dec(int)(size, (int **)sequence);
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
     static SwigSciObject set(int size, void *sequence) {
-      return SWIG_FromSet_Sequence_dec(int)(size, (int *)sequence);
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
   };
 
-  // For sequence of pointers
-
+  // Support sequence containers of pointers
   template <typename T> struct traits_as_sequence<T*> {
     static int check(SwigSciObject obj) {
       return SWIG_AsCheck_Sequence_dec(ptr)(obj);
@@ -132,31 +125,27 @@ namespace swig {
 //
 
 %fragment(SWIG_Traits_SequenceItem_frag(ptr), "header",
-  fragment=SWIG_AsVal_SequenceItem_frag(int),
-  fragment=SWIG_From_SequenceItem_frag(int),
   fragment=SWIG_AsVal_SequenceItem_frag(ptr),
   fragment=SWIG_From_SequenceItem_frag(ptr),
   fragment="StdTraits") {
 
 namespace swig {
-  // For sequence of values, considers int as default type (so it works for enums)
-
+  // Error returned for sequence containers of default item type
   template <typename T> struct traits_asval_sequenceitem {
-    static int asval(SwigSciObject obj, void *pSequence, int iItemIndex, T *pItemValue) {
-      return SWIG_AsVal_SequenceItem_dec(int)(obj, (int *)pSequence, iItemIndex, (int *)pItemValue);
+    static T asval(SwigSciObject obj, void *pSequence, int iItemIndex) {
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
   };
   template <typename T> struct traits_from_sequenceitem {
     static int from(void *pSequence, int iItemIndex, T itemValue) {
-      return SWIG_From_SequenceItem_dec(int)((int *)pSequence, iItemIndex, (int)itemValue);
+      SWIG_Error(SWIG_TypeError, type_name<T>());
     }
   };
 
-  // Sequence of pointers
-
+  // Support sequence containers of pointers
   template <typename T> struct traits_asval_sequenceitem<T*> {
-    static int asval(SwigSciObject obj, void *pSequence, int iItemIndex, T **pItemValue) {
-      return SWIG_AsVal_SequenceItem_dec(ptr)(obj, (int *)pSequence, iItemIndex, (void **)pItemValue);
+    static T* asval(SwigSciObject obj, void *pSequence, int iItemIndex) {
+      return static_cast<T*>(SWIG_AsVal_SequenceItem_dec(ptr)(obj, (int *)pSequence, iItemIndex));
     }
   };
   template <typename T> struct traits_from_sequenceitem<T*> {
@@ -175,8 +164,8 @@ namespace swig {
 
 namespace swig {
   template <> struct traits_asval_sequenceitem<CppType > {
-    static int asval(SwigSciObject obj, void *pSequence, int iItemIndex, CppType *pItemValue) {
-      return SWIG_AsVal_SequenceItem_dec(CppType)(obj, (ScilabType *)pSequence, iItemIndex, pItemValue);
+    static CppType asval(SwigSciObject obj, void *pSequence, int iItemIndex) {
+      return SWIG_AsVal_SequenceItem_dec(CppType)(obj, (ScilabType *)pSequence, iItemIndex);
     }
   };
   template <> struct traits_from_sequenceitem<CppType > {
diff --git a/Lib/scilab/scisequencebool.swg b/Lib/scilab/scisequencebool.swg
index 2a55a68ec..1d802a8f8 100644
--- a/Lib/scilab/scisequencebool.swg
+++ b/Lib/scilab/scisequencebool.swg
@@ -84,10 +84,9 @@ SWIG_FromSet_Sequence_dec(bool)(int _size, int *_sequence) {
 
 %fragment(SWIG_AsVal_SequenceItem_frag(bool), "header") {
 
-SWIGINTERN int
-SWIG_AsVal_SequenceItem_dec(bool)(SwigSciObject _obj, int *_pSequence, int _iItemIndex, bool *_pItemValue) {
-  *_pItemValue = _pSequence[_iItemIndex];
-  return SWIG_OK;
+SWIGINTERN bool
+SWIG_AsVal_SequenceItem_dec(bool)(SwigSciObject _obj, int *_pSequence, int _iItemIndex) {
+  return _pSequence[_iItemIndex];
 }
 }
 
diff --git a/Lib/scilab/scisequencedouble.swg b/Lib/scilab/scisequencedouble.swg
index 03cb0ebcc..74d01fed0 100644
--- a/Lib/scilab/scisequencedouble.swg
+++ b/Lib/scilab/scisequencedouble.swg
@@ -84,10 +84,9 @@ SWIG_FromSet_Sequence_dec(double)(int _size, double *_sequence) {
 
 %fragment(SWIG_AsVal_SequenceItem_frag(double), "header") {
 
-SWIGINTERN int
-SWIG_AsVal_SequenceItem_dec(double)(SwigSciObject _obj, double *_pSequence, int _iItemIndex, double *_pItemValue) {
-  *_pItemValue = _pSequence[_iItemIndex];
-  return SWIG_OK;
+SWIGINTERN double
+SWIG_AsVal_SequenceItem_dec(double)(SwigSciObject _obj, double *_pSequence, int _iItemIndex) {
+  return _pSequence[_iItemIndex];
 }
 }
 
diff --git a/Lib/scilab/scisequenceint.swg b/Lib/scilab/scisequenceint.swg
index 6c39ee7b8..a4216529e 100644
--- a/Lib/scilab/scisequenceint.swg
+++ b/Lib/scilab/scisequenceint.swg
@@ -84,9 +84,8 @@ SWIG_FromSet_Sequence_dec(int)(int _size, int *_sequence) {
 %fragment(SWIG_AsVal_SequenceItem_frag(int), "header") {
 
 SWIGINTERN int
-SWIG_AsVal_SequenceItem_dec(int)(SwigSciObject _obj, int *_pSequence, int _iItemIndex, int *_pItemValue) {
-  *_pItemValue = _pSequence[_iItemIndex];
-  return SWIG_OK;
+SWIG_AsVal_SequenceItem_dec(int)(SwigSciObject _obj, int *_pSequence, int _iItemIndex) {
+  return _pSequence[_iItemIndex];
 }
 }
 
diff --git a/Lib/scilab/scisequencepointer.swg b/Lib/scilab/scisequencepointer.swg
index 8c4943541..1cdc63fca 100644
--- a/Lib/scilab/scisequencepointer.swg
+++ b/Lib/scilab/scisequencepointer.swg
@@ -74,41 +74,42 @@ SWIG_FromSet_Sequence_dec(ptr)(int _size, long long *_sequence) {
 
 %fragment(SWIG_AsVal_SequenceItem_frag(ptr), "header") {
 
-SWIGINTERN int
-SWIG_AsVal_SequenceItem_dec(ptr)(SwigSciObject _obj, int *_piSequence, int _itemIndex, void **_pItemValue)
+SWIGINTERN void*
+SWIG_AsVal_SequenceItem_dec(ptr)(SwigSciObject _obj, int *_piSequence, int _itemIndex)
 {
   SciErr sciErr;
   int *piItemAddr;
   int iType;
+  void* pItemValue = NULL;
 
   sciErr = getListItemAddress(pvApiCtx, _piSequence, _itemIndex + 1, &piItemAddr);
   if (sciErr.iErr)
   {
     printError(&sciErr, 0);
-    return SWIG_ERROR;
+    return NULL;
   }
 
   sciErr = getVarType(pvApiCtx, piItemAddr, &iType);
   if (sciErr.iErr)
   {
     printError(&sciErr, 0);
-    return SWIG_ERROR;
+    return NULL;
   }
 
   if (iType != sci_pointer)
   {
     Scierror(999, _("%s: Wrong type for input argument #%d: A pointer is expected at list item #%d.\n"), fname, _obj, _itemIndex + 1);
-    return SWIG_ERROR;
+    return NULL;
   }
 
-  sciErr = getPointerInList(pvApiCtx, _piSequence, _itemIndex + 1, (void **)_pItemValue);
+  sciErr = getPointerInList(pvApiCtx, _piSequence, _itemIndex + 1, &pItemValue);
   if (sciErr.iErr)
   {
     printError(&sciErr, 0);
-    return SWIG_ERROR;
+    return NULL;
   }
 
-  return SWIG_OK;
+  return pItemValue;
 }
 }
 
diff --git a/Lib/scilab/scisequencestring.swg b/Lib/scilab/scisequencestring.swg
index 4227a4b6e..b52f18716 100644
--- a/Lib/scilab/scisequencestring.swg
+++ b/Lib/scilab/scisequencestring.swg
@@ -76,10 +76,9 @@ SWIG_FromSet_Sequence_dec(std::string)(int _size, char **_sequence) {
 
 %fragment(SWIG_AsVal_SequenceItem_frag(std::string), "header") {
 
-SWIGINTERN int
-SWIG_AsVal_SequenceItem_dec(std::string)(SwigSciObject _obj, char **_pSequence, int _iItemIndex, std::string *_pItemValue) {
-  *_pItemValue = std::string(_pSequence[_iItemIndex]);
-  return SWIG_OK;
+SWIGINTERN std::string
+SWIG_AsVal_SequenceItem_dec(std::string)(SwigSciObject _obj, char **_pSequence, int _iItemIndex) {
+  return std::string(_pSequence[_iItemIndex]);
 }
 }