diff --git a/EGkVolZmap.h b/EGkVolZmap.h
index 6b02796..0e4f6d9 100644
--- a/EGkVolZmap.h
+++ b/EGkVolZmap.h
@@ -26,9 +26,9 @@ class __declspec( novtable) IVolZmap : public IGeoObj
 {
    public :
       virtual bool CopyFrom( const IGeoObj* pGObjSrc) = 0 ;
-      virtual bool Create( const Point3d& ptO, double dDimX, double dDimY, double dDimZ, double dPrec) = 0 ;
-      virtual bool CreateFromFlatRegion( const ISurfFlatRegion& Surf, double dDimZ, double dPrec) = 0 ;
-      virtual bool CreateFromTriMesh( const ISurfTriMesh& Surf, double dPrec) = 0 ;
+      virtual bool Create( const Point3d& ptO, double dDimX, double dDimY, double dDimZ, double dPrec, bool bTriDex) = 0 ;
+      virtual bool CreateFromFlatRegion( const ISurfFlatRegion& Surf, double dDimZ, double dPrec, bool bTriDex) = 0 ;
+      virtual bool CreateFromTriMesh( const ISurfTriMesh& Surf, double dPrec, bool bTriDex) = 0 ;
       virtual bool GetAllTriangles( TRIA3DLIST& lstTria) const = 0 ;
       virtual bool GetDexelLines( int nDir, int nPos1, int nPos2, POLYLINELIST& lstPL) const = 0 ;
       virtual bool SetTolerances( double dLinTol, double dAngTolDeg = 90) = 0 ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 9acd7f1..838cfae 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -257,10 +257,10 @@ EXE_EXPORT int  ExeCreateSurfTmByTriangles( int nParentId, const INTVECTOR& vIds
 EXE_EXPORT int  ExeCreateSurfTmBySewing( int nParentId, const INTVECTOR& vIds, bool bErase) ;
 
 // GeomDB Create Volume
-EXE_EXPORT int  ExeCreateVolZmap( int nParentId, const Point3d& ptIni,
-                                  double dDimX, double dDimY, double dDimZ, double dPrec, int nRefType) ;
-EXE_EXPORT int  ExeCreateVolZmapByRegionExtrusion( int nParentId, int nSfrId, double dDimZ, double dPrec) ;
-EXE_EXPORT int  ExeCreateVolZmapFromSurfTm( int nParentId, int nStmId, double dPrec) ;
+EXE_EXPORT int  ExeCreateVolZmap( int nParentId, const Point3d& ptIni, double dDimX,
+                                   double dDimY, double dDimZ, double dPrec, bool bTriDex, int nRefType) ;
+EXE_EXPORT int  ExeCreateVolZmapByRegionExtrusion( int nParentId, int nSfrId, double dDimZ, double dPrec, bool bTriDex) ;
+EXE_EXPORT int  ExeCreateVolZmapFromSurfTm( int nParentId, int nStmId, double dPrec, bool bTriDex) ;
 
 // GeomDB PartLayer
 EXE_EXPORT bool ExeIsPart( int nPartId) ;