>I have a program that prints labels with barcodes on Zebra printers.
>The user has two printers attached to a computer where she is running two copies of my program.
>Printers are different models, using different drivers but both from Zebra. The user has been reporting to me that when she pauses printers due to media change or any other reason one of the printers will not print all labels. Longer printer is paused more labels to lose. The labels are just a VFP report with a custom page size.
>
>Any thoughts?

Rework your report to be able to re-print any range of labels. Zebra drivers are notorious - I once sat with the network guy for two days trying to make two seemingly identical ones use the same drivers on two seemingly identical machines, no joy. And my app was printing from Excel, so no VFP-not-playing-with-modern-stuff crap, just bad drivers.

For any other printer I know, if it didn't print a page, its Windows driver will know it and will reprint that page. Take your ink jet and cause a paper jam - when you remove the jam, put the paper right, it should try to print that last page again. Windows spooler is about the worst spooler I ever saw (and I saw a few, even stuff which was used 20 years ago was better), but it should not lose pages. If it does, then it's the driver not recognizing the out-of-paper signal from the printer, or printer not sending one at all.

There are alternate drivers for Zebras, you may try. Check what the guys on the web say about each of these drivers.

Good luck.