Fujitsu PowerForm error messages

I've been using PowerForm for about 5 to 10 years (can't remember - has it
been out that long?).  In using the PowerCobol debugger, you sometimes get
an error message that is along the lines of

JMP0320I-I [PID.....]INPUT/OUTPUT ERROR. STM=WRITE. FILE=finance.prt
"ERRCD=9062"

This doesn't correspond to the error codes given in the PowerForm Run Time
Guide, but
I seem to remember that the "90" and "62" relate to tables somewhere in the
Fujitsu Cobol
documentation.

I've had this error in years past, and can't remember what it means.  I've
searched the
documentation, but can't seem to find the information.

Can anyone tell me what the error means, or even better, point me to the
pages in the docs
where its explained?  That way, I won't have to go looking for help next
time!

don