After resolving the prior problem of being unable to edit/modify tab panels after conversion from 11 to 12 (fmp advanced) I realized that any field that had previously had been configured with a button was no longer linked to any script.
I had to go into every field that needed to access a script and link them together. What a pain. I'm hoping that when I get into converting more of my fmp 11 files into 12 that my experience with my first conversion is not repeated.
I'd appreciate any input from others on any additional problems you may have experienced upgrading from fmp 11 to 12 and any quick and easy solutions to such problems.