>We have users on our Fox 2.6 apps who are encountering Illegal Operation Errors when printing on their HP LaserJet 4500s.
>
>So far, Microsoft hasn't posted a solution or indication of what's causing the problem. HP is vague.
>
>Has anyone experienced this problem and has a solution or explanation for this?
>

The HP driver is leaving the CPU's FP registers in an inconsistent state. It's a driver problem.

You can prove this out by using a different driver for the printer. You can use the HP LaserJet 4 driver, for example, from an MS operating system distribution rather than the HP-supplied driver. Switching drivers to a known, well-behaved print driver distributed by MS will prove out that the issue is in the driver.

>
>Thanks,
>Andrea
>Raechel@mccr.com
>
>Details: "FOXPROW caused a general protection fault in module HPBFDB1.DRV at 0015:000068ca."