diff --git a/API_MachMgr.cpp b/API_MachMgr.cpp
index c155020..92656c3 100644
--- a/API_MachMgr.cpp
+++ b/API_MachMgr.cpp
@@ -1342,9 +1342,9 @@ __stdcall EgtIsMachiningEmpty( void)
 // Simulation
 //-----------------------------------------------------------------------------
 BOOL
-__stdcall EgtSimStart( void)
+__stdcall EgtSimStart( BOOL bFirst)
 {
-   return ( ExeSimStart() ? TRUE : FALSE) ;
+   return ( ExeSimStart( bFirst ? TRUE : FALSE) ? TRUE : FALSE) ;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 1cf355a..fd6f3f4 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ