The quick answer is to take the 'd' from '9d' and find out what the ascii value is.

:CALC ORD('d')
100, $64, %144

You are getting FSERR 100

:RUN ERR.PUBXL.TELESUP (you could also use MSGUTIL)
WHAT ERROR NUMBER ? 100

Look for the FSERR it is:
--FILE SYSTEM ERROR-----------------------------------------------SET 8---
DUPLICATE PERMANENT FILE NAME  (FSERR 100)

Certainly not as nice as having the program look-up and print the error msg but handy if the code isn't there already.

Boris Kortiak wrote:

> Thanks all.  I found what I needed in the KSAM manual as pointed out by many here.  Now its time to roll up the sleeves and find the coding mistake I made which is causing this.
>
> Thanks again.