diff --git a/Lib/scilab/scicontainer.swg b/Lib/scilab/scicontainer.swg
index 41458d509..335e36e37 100644
--- a/Lib/scilab/scicontainer.swg
+++ b/Lib/scilab/scicontainer.swg
@@ -68,6 +68,7 @@ namespace swig
         {
           return value;
         }
+        else throw std::invalid_argument("Cannot get sequence item.");
       }
       catch (std::exception& e)
       {
@@ -437,10 +438,7 @@ namespace swig {
           }
           return traits_from_sequence<value_type>::set(size, data);
         }
-        else
-        {
-          return 0;
-        }
+        return 0;
       }
       catch (std::exception& e)
       {
diff --git a/Lib/scilab/scisequencepointer.swg b/Lib/scilab/scisequencepointer.swg
index 26c71bc8a..b4f5afc60 100644
--- a/Lib/scilab/scisequencepointer.swg
+++ b/Lib/scilab/scisequencepointer.swg
@@ -117,5 +117,6 @@ SWIG_AsVal_SequenceItem_dec(ptr)(SciObject _obj, int *_piSequence, int _itemInde
 SWIGINTERN int
 SWIG_From_SequenceItem_dec(ptr)(long long *_pSequence, int _iItemIndex, long long _itemValue) {
   _pSequence[_iItemIndex] = _itemValue;
+  return SWIG_OK;
 }
 }