Thanks for looking and responding to this. I have isolated it even more and found one line in the .bdf file that is different between files that work and those that do not. After the copyright info at the top of the file the files that do NOT work have this line:
//#pragma file_not_in_maxplusii_format
Files that work do not have that line. If I delete that line in the bdf file with a text editor, the file then works fine. Somewhere there is a software switch that needs to be changed so that when I create new bdf files the offending line does not get generated. For now at least I can delete that line to make things work, but that obviously is kludgy and not a real solution.
Thanks again
Steve