A version number of zero indicates a corrupt input file. It would be very helpful if you could recall anything strange that happened to cause this. If you have a backup of your file, you should replace things with your backup.
If you haven't made a backup, CAESAR II makes them here:
"C:\Documents and Settings"YOUR LOGIN ID"\Local Settings\Application Data\CAESAR II v.5.10", where "YOUR LOGIN ID" will vary from user to user.
You'll find a subdirectory here for each job, with a number of piping input files. Take the most recent and start from there.
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Regards,
Richard Ay - Consultant