Thanks Chuck, That does seem logical. It is odd that the problem is so
sporadic and unpredicatble (so far). It may happen 2-3 times in a single
print job or may not happen for 10 or more jobs of different number of
sources and records printed. There never was a problem with the program in
Win988SE so I was unsure where the fault lies. There have not been any
"hiccups" with the other programs I use.

"Chuck" wrote:

> Skipping back would imply that a data pointer is not incrementing properly.
> Usually, this points to the application program.
>
> "Steve Q" <Steve Q@discussions.microsoft.com> wrote in message
> news:719DCC3B-17BC-4D75-B774-1191A2269B88@microsoft.com...
> > When printing to a high speed envelope printer (Rena 612) using Rena's
> > JetMate program, it will skip back any number of addresses and reprint
> them.
> > It happens sporadically sometimes every day or maybe once a week, and can
> > occur at any point in the spool. I can not duplicate the problem, it just
> > happens regardless of which programs are running or after a fresh boot. It
> > happens regardless of which data file is used. The only way to catch this
> > error is watching each sequential address printed, or after running short
> of
> > material due to the reprints (which can number anywhere from 50 to 800+
> > addresses). Note that this problem occured only after building a new
> computer
> > with WinXP Pro. The previous computer was Win98SE with the same programs.
>
>
>