Cheers HateR
Yes, this is part of an addon, which explains why I was so confused that it worked in a test mission but not in the other situation ...
the only reason I was using preprocess is to remove \\ and \* comments.
I will give the double dots "..\" a go. This normally means 'down directory' in dos-speak, doesn't it?
Anyhow, if nothing else works, I will simply switch over to loadfile and do away with comments ... which is a bugger, but if I have to then I will.
Btw, this would have been in the bugged/bis'd commands thread, wouldn't it? I didn't think to look there. Anyhow, will post a comment in the comref about this once I test it tonight. Thanks for the help.