porting to version 6.6.0

Dear forum Supervisor,

I am having two issues with porting from version 6.3 to version 6.6.0 first in setting the units and second with the selection in a custom AIS:

1- Units Setup:
My application used to call the units setup at the start to set the base units, it is crashing with Access violation at this point, has the method for setting the units changed. I was using the following code :

UnitsAPI::SetLocalSystem(UnitsAPI_MDTV);

2- Selection in Custom AIS:

I have a custom AIS object, and where it computes the selection is failing.

I noticed the selection system changed where you need to supply a deflection and angle deviation number.

My selections are not working in neutral mode, when I switch to any of the localcontexts it also crashes with an access violation, I have the compute selection code as follows:

switch(aMode){
case 0: //this is neutral mode and not working as shown here
StdSelect_BRepSelectionTool::Load(aSelection,myShape,TopAbs_COMPOUND,0.1,0.1);
break;
case 1: // any of these crashes
StdSelect_BRepSelectionTool::Load(aSelection,myShape,TopAbs_VERTEX,0.1,0.1);
break;
case 2:
StdSelect_BRepSelectionTool::Load(aSelection,myShape,TopAbs_EDGE,0.1,0.1);
break;
case 3:
StdSelect_BRepSelectionTool::Load(aSelection,myShape,TopAbs_WIRE,0.1,0.1);
break;
case 4:
StdSelect_BRepSelectionTool::Load(aSelection,myShape,TopAbs_FACE,0.1,0.1);
break;
}

Do I have my neutral mode correct should it be using TopAbs_COMPOUND or any other kind of shape type, in version 6.3 it was not pointing to anything in neutral mode, only in local context did you had to supply the type.

are there any tips on how to setup the compute selection on version 6.6.0?

Best,

Alex