Thank you.  

The partitioning algorithm is not a basic program.  It is simply this
"MOD(@ID,13) +  1".

Also the blow up occurs not while stepping through the program but upon
continuing the process to completion.  I usually do this by "IF @ID =
??? THEN DEBUG" once I've looked at all I want to see, I just hit 'C' to
continue and it blows up.

Brenda

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Brian Leach
Sent: Thursday, September 14, 2006 9:52 AM
To: [email protected]
Subject: RE: [U2] Debugging a program using distributed files causes
core dump

To explain Stuart's remark: distributed files use a partitioning
algorithm
to determine which physical file the record should hash into. This
algorithm
can optionally be a user-supplied BASIC subroutine. So the debugger may
be
getting lost trying to step into the partitioning code.

Which doesn't help answering Brenda's question though.
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