Thanks, Jonas --
Actually, I dealt with that potential source of anomalies way back in the original CodeWarrior version: the Pascal code opens and writes out to the file under a different name than the one the LISP code is looking for. Only after the file's been written and closed is it renamed so LISP can find, read, and (attempt to) delete it. The FPC version does the same thing, yet the CW executable works and the FPC one doesn't. Go figure.
Falling back on the old Mac FileManager routines seems to have done the trick, though
Bill
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When you call close() on a file, it will be flushed and closed
immediately. From what you described, it seems more likely to me that
the FPC code is probably opening and reading the file before the LISP
code has finished writing it (and/or vice versa), because FPC's
standard I/O routines do not try to acquire exclusive access files
(regardless of whether you open them for reading and/or writing).
The Carbon routines probably do check for exclusive access by default,
so the LISP code will only open the file once the MW/FPC code is
finished, and vice versa.
Jonas