diff --git a/src/GEOMAlgo/GEOMAlgo_Builder.cdl b/src/GEOMAlgo/GEOMAlgo_Builder.cdl
index 42eb89e86..967bc05f9 100755
--- a/src/GEOMAlgo/GEOMAlgo_Builder.cdl
+++ b/src/GEOMAlgo/GEOMAlgo_Builder.cdl
@@ -99,6 +99,13 @@ is
     -- 
     --    protected methods  
     --  
+    -- 
+    PerformInternal(me:out; 
+    	theDSF: DSFiller from NMTTools) 
+    	---Purpose:  Performs calculations using prepared DSFiller 
+	--           object theDSF          	 
+    	is protected; 
+    --
     PrepareHistory (me:out) 
     	---Purpose:  Prepare information for history support  
     	is redefined protected;  
@@ -241,7 +248,7 @@ fields
     mySameDomainShapes: IndexedDataMapOfShapeShape from TopTools is protected;
     --  solids 
     myDraftSolids     : IndexedDataMapOfShapeShape from TopTools is protected; 
-    
+    myEntryPoint      : Integer from Standard is protected;    
     --     
 end Builder;
 
diff --git a/src/GEOMAlgo/GEOMAlgo_Builder.cxx b/src/GEOMAlgo/GEOMAlgo_Builder.cxx
index 0ab651cde..284cd7b10 100755
--- a/src/GEOMAlgo/GEOMAlgo_Builder.cxx
+++ b/src/GEOMAlgo/GEOMAlgo_Builder.cxx
@@ -52,6 +52,7 @@
 {
   myNbTypes=9;
   myDSFiller=NULL;
+  myEntryPoint=0; // Entry point through PerformWithFiller ()
 }
 //=======================================================================
 //function : ~
@@ -59,6 +60,12 @@
 //=======================================================================
   GEOMAlgo_Builder::~GEOMAlgo_Builder()
 {
+  if (myEntryPoint==1) {
+    if (myDSFiller) {
+      delete myDSFiller;
+      myDSFiller=NULL;
+    }
+  }
 }
 //=======================================================================
 //function : AddCompound
@@ -253,18 +260,33 @@
     aBB.Add(aCS, aS);
   }
   //
+  if (myDSFiller) {
+    delete myDSFiller;
+    myDSFiller=NULL;
+  }
   NMTTools_DSFiller* pDSF=new NMTTools_DSFiller;
   //
   pDSF->SetCompositeShape(aCS);
   pDSF->Perform();
   //
-  PerformWithFiller(*pDSF);
+  myEntryPoint=1;
+  PerformInternal(*pDSF);
 }
 //=======================================================================
 //function : PerformWithFiller
 //purpose  : 
 //=======================================================================
   void GEOMAlgo_Builder::PerformWithFiller(const NMTTools_DSFiller& theDSF)
+{
+  myEntryPoint=0;
+  //
+  PerformInternal(theDSF);
+}
+//=======================================================================
+//function : PerformInternal
+//purpose  : 
+//=======================================================================
+  void GEOMAlgo_Builder::PerformInternal(const NMTTools_DSFiller& theDSF)
 {
   myErrorStatus=0;
   //
diff --git a/src/GEOMAlgo/GEOMAlgo_Builder.hxx b/src/GEOMAlgo/GEOMAlgo_Builder.hxx
index b6bc2e9e1..2f38d77fb 100644
--- a/src/GEOMAlgo/GEOMAlgo_Builder.hxx
+++ b/src/GEOMAlgo/GEOMAlgo_Builder.hxx
@@ -137,6 +137,10 @@ protected:
  // Methods PROTECTED
  // 
 
+//!  Performs calculations using prepared DSFiller <br>
+//!           object theDSF <br>
+Standard_EXPORT   void PerformInternal(const NMTTools_DSFiller& theDSF) ;
+
 //!  Prepare information for history support <br>
 Standard_EXPORT virtual  void PrepareHistory() ;
 
@@ -220,6 +224,7 @@ TopTools_IndexedDataMapOfShapeListOfShape myInParts;
 BRepAlgo_Image mySplitFaces;
 TopTools_IndexedDataMapOfShapeShape mySameDomainShapes;
 TopTools_IndexedDataMapOfShapeShape myDraftSolids;
+Standard_Integer myEntryPoint;
 
 
 private: