Ed, I have dealt with UniData file corruption in the past and it can be
quite difficult to get a handle on it. I have seen files get corrupted by
memory failures, processor failures, and disk failures. If this is not due
to a hardware issue a file can be corrupted,(or at least used to be
corrupted depend on your release) by performing a unix copy (cp -rp) on a
file that is being updated, and running guide against a file that me be in
use. There could be more issues that haven't been listed. 

I have also found that running guide against a corrupt file does not always
fix the file. In some cases a second check against a file by guide has
turned up more errors. There are times when a file has been corrupted, guide
can't fix it. I usually make a copy of the file, clear it, and copy the
records into it, and run guide against this file.

The fact that AE will let you access a record only means the editor can read
the record. If you try to change something in the record and file it, you
will see errors.

We don't use triggers, so I can't comment on that.

Rich

Richard Sammartino
Systems Analyst
School District of Philadelphia
440 N Broad Street
Philadelphia,  Pa 19130
Phone: (215) 400-5086
Fax:   (215) 400-4411 
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