Part: fixes #6282: exportStep breaking model

src/Mod/Part/App/TopoShape.cpp

@@ -395,7 +395,7 @@ TopoDS_Shape TopoShape::getSubShape(TopAbs_ShapeEnum type, int index, bool silen
 
 unsigned long TopoShape::countSubShapes(const char* Type) const
 {
-    if(!Type)
+    if(!Type)
         return 0;
     if(strcmp(Type,"SubShape")==0)
         return countSubShapes(TopAbs_SHAPE);
@@ -990,6 +990,10 @@ void TopoShape::exportIges(const char *filename) const
 void TopoShape::exportStep(const char *filename) const
 {
     try {
+        // Fixes issue #6282
+        // Do not write out any assembly information when using the simplified STEP export
+        Interface_Static::SetIVal("write.step.assembly", 0);
+
         // write step file
         STEPControl_Writer aWriter;