File: StepToTopoDS_TranslateFace.cxx
Lines: 422, 466
Problem: aFS variable is never initialized, so condition (!aFS.IsNull()) is always true.

Lines: 459-362
Problem: It would be more correct if we calculate the missing normals

Files: StepToTopoDS_TranslateSolid.cxx
       StepToTopoDS_TranslateShellSolid.cxx
	   StepToTopoDS_TranslateFace.cxx
Problem:
   Suppose that the STEP file contains only tessellated representation of the model.
   Where is the protection for double construction of the TopoDS_Shell and 
   triple construction of the TopoDS_Face during proceeding of the
   StepVisual_TessellatedSolid, StepVisual_TessellatedShell, StepVisual_TessellatedFace?
   
File: TopoDSToStep_MakeManifoldSolidBrep.cxx
Lines: 88, 113
Problem: Done flag is true if at least one of the results is not null. Is it normal?
   There is no father protection from the null result.