Werner, thank you so much for your attention. I have Prime 7, and that is where the converter fails to convert an .mcd file. The particular file I sent you calls data from the same folder so it should have empty calls, that is not the problem: Prime 7 converter will simply not open it. I should have been more careful about sending you a file, but since I cannot open them any longer, I have to guess.
I think this new attached file does not call any outside data, but the Prime 7 converter fails to open this and then aborts. I have a trial version of Prime 7, and I would have bought the full version at the end of the trial were it not for this most important glitch. I suppose I could wait for Prime 8, and wait to find out how expensive it will be. Any ideas on that?