"Disappearing ._A files don't bother me as long as there is a .CAESAR II file created in it's place.
CAESAR II V5.00 cleans up the folder where you are running CAESAR II by collecting all of the many files associated with a single job (e.g. job1._a, job1._j, job1._p, etc.) and "zipping" them up into the smaller and more portable .CAESAR II file (i.e. job1.CAESAR II). You can see this take place when you open and close a CAESAR II file.
The problem that we are addressing is when these files don't move where they are supposed to move.
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Dave Diehl