LDCad 1.6 (win+linux)

[Kevin]

I'm running into a problem in LDCad that I'm hoping someone can help me with.  Custom parts that I define are not picking up the LDraw primitives like 4-4ring and 4-4disc or my own primitives coded within the same file.  For example, here is a custom tile as it appears in MLCad:

   

Here is the exact same file as displayed in LDCad:

   

Any ideas?

Thank you.

Kevin