diff --git a/ENkMachOptimization.h b/ENkMachOptimization.h
index 94fd718..57fad26 100644
--- a/ENkMachOptimization.h
+++ b/ENkMachOptimization.h
@@ -81,8 +81,15 @@ struct MachOptm {
       dA_Start( dA_Start) , dB_Start( dB_Start), dC_Start( dC_Start),
       dX_End( dX_End), dY_End( dY_End), dZ_End( dZ_End),
       dA_End( dA_End), dB_End( dB_End), dC_End( dC_End) {}
+   MachOptm()
+      : nId( -1), nIdTool( -1), nGroup( -1),
+        dX_Start( 0.), dY_Start( 0.), dZ_Start( 0.),
+        dA_Start( 0.) , dB_Start( 0.), dC_Start( 0.),
+        dX_End( 0.), dY_End( 0.), dZ_End( 0.),
+        dA_End( 0.), dB_End( 0.), dC_End( 0.) {} ;
 } ;
 typedef std::vector<MachOptm> MACHOPTMVECTOR ;
+typedef std::vector<MACHOPTMVECTOR> MACHOPTMMATRIX ;
 typedef std::list<MachOptm> MACHOPTMLIST ;
 
 //----------------------------------------------------------------------------
@@ -104,8 +111,9 @@ class __declspec( novtable) IMachOptimization
       virtual bool SetLastMachining( int nId) = 0 ;
       virtual bool SetFeeds( double dFeedL, double dFeedA) = 0 ;
       virtual bool SetAllGroupsAsMandatory( bool bAllMandatory = false) = 0 ;
+      virtual bool SetOptimizationForGroups( bool bOptForGroups = false) = 0 ;
       virtual bool GetResult( INTVECTOR& vIds) = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------
-ENK_EXPORT IMachOptimization* CreateMachOptimization( void) ;
\ No newline at end of file
+ENK_EXPORT IMachOptimization* CreateMachOptimization( void) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 9f77609..1c979d5 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -233,6 +233,7 @@ EXE_EXPORT bool ExeOptMachSetFeeds( double dFeedL, double dFeedA) ;
 EXE_EXPORT bool ExeOptMachAddDependence( int nIdPrec, int nIdNext) ;
 EXE_EXPORT bool ExeOptMachAddSuggestedDependence( int nIdPrec, int nIdNext) ;
 EXE_EXPORT bool ExeOptMachSetAllGroupDependencesAsMandatory( bool bAllMandatory) ;
+EXE_EXPORT bool ExeOptMachSetOptimizationForGroups( bool bOptForGroups) ;
 EXE_EXPORT bool ExeOptMachGetResult( INTVECTOR& vIds) ;
 
 // GeomDB Create