diff --git a/EExImportBtl.h b/EExImportBtl.h
index dd13349..210f2f0 100644
--- a/EExImportBtl.h
+++ b/EExImportBtl.h
@@ -29,7 +29,8 @@ class __declspec( novtable) IImportBtl
 {
    public :
       virtual ~IImportBtl( void) {} 
-      virtual bool Import( const std::string& sFile, IGeomDB* pGDB, bool bFlatPos = false) = 0 ;
+      virtual bool Import( const std::string& sFile, IGeomDB* pGDB,
+                           bool bFlatPos = false, bool bSpecialTrim = false) = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------
diff --git a/EGkSurfTriMesh.h b/EGkSurfTriMesh.h
index b5c1ec5..2bbbbc6 100644
--- a/EGkSurfTriMesh.h
+++ b/EGkSurfTriMesh.h
@@ -63,6 +63,7 @@ class __declspec( novtable) ISurfTriMesh : public ISurf
       virtual bool GetVertexSmoothNormal( int nV, int nT, Vector3d& vtN) const = 0 ;
       virtual bool GetTriangleBoundaryEdges( int nId, TriFlags3d& TFlags) const = 0 ;
       virtual bool GetTriangleSmoothNormals( int nId, TriNormals3d& TNrms) const = 0 ;
+      virtual bool GetLoops( POLYLINEVECTOR& vPL) const = 0 ;
       virtual int  GetFacetCount( void) const = 0 ;
       virtual int  GetFacetSize( void) const = 0 ;
       virtual int  GetFacetFromTria( int nT) const = 0 ;
diff --git a/EInAPI.h b/EInAPI.h
index 79e0f98..6699bfb 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -86,7 +86,7 @@ EIN_EXPORT BOOL __stdcall EgtImportDxf( const wchar_t* wsFilePath, double dScale
 EIN_EXPORT BOOL __stdcall EgtImportStl( const wchar_t* wsFilePath, double dScaleFactor) ;
 EIN_EXPORT BOOL __stdcall EgtImportCnc( const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtImportCsf( const wchar_t* wsFilePath) ;
-EIN_EXPORT BOOL __stdcall EgtImportBtl( const wchar_t* wsFilePath, BOOL bFlatPos) ;
+EIN_EXPORT BOOL __stdcall EgtImportBtl( const wchar_t* wsFilePath, BOOL bFlatPos, BOOL bSpecialTrim) ;
 EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtExportStl( int nId, const wchar_t* wsFilePath) ;
 
diff --git a/EXeExecutor.h b/EXeExecutor.h
index b2753fc..28fb45e 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -87,7 +87,7 @@ EXE_EXPORT bool ExeImportDxf( const std::string& sFilePath, double dScaleFactor)
 EXE_EXPORT bool ExeImportStl( const std::string& sFilePath, double dScaleFactor) ;
 EXE_EXPORT bool ExeImportCnc( const std::string& sFilePath) ;
 EXE_EXPORT bool ExeImportCsf( const std::string& sFilePath) ;
-EXE_EXPORT bool ExeImportBtl( const std::string& sFilePath, bool bFlatPos) ;
+EXE_EXPORT bool ExeImportBtl( const std::string& sFilePath, bool bFlatPos, bool bSpecialTrim) ;
 EXE_EXPORT bool ExeExportDxf( int nId, const std::string& sFilePath) ;
 EXE_EXPORT bool ExeExportStl( int nId, const std::string& sFilePath) ;
 
@@ -387,6 +387,7 @@ EXE_EXPORT bool ExeSurfFrSubtract( int nId1, int nId2) ;
 EXE_EXPORT bool ExeSurfFrIntersect( int nId1, int nId2) ;
 EXE_EXPORT bool ExeSurfFrOffset( int nId, double dDist, int nType) ;
 EXE_EXPORT int  ExeExtractSurfFrChunkLoops( int nId, int nChunk, int nDestGrpId, int* pnCount) ;
+EXE_EXPORT int  ExeExtractSurfTmLoops( int nId, int nDestGrpId, int* pnCount) ;
 EXE_EXPORT int  ExeExtractSurfTmFacetLoops( int nId, int nFacet, int nDestGrpId, int* pnCount) ;
 
 // Geo Snap Vector/Point/Frame