RE: PCF Files

I saw something similar a while back. Are you seeing a text window flash with any error messages?

My problem was caused by having some PCF files with an old "SUE Inclusion" lines at the bottom. The message in the text window said that "Symbol '$(Units)' is undefined", and I was able to fix it by copying the new SUE Inclusion lines from the current examples project into my older PCFs.

If that is not the case, it should be easy to test your PCFs by commenting out a group of lines at a time to see which ones are causing the problem.