>When I send reports in a Hp 840C printer, I'm getting, in some occasions the error :
>
>Exepcion grave 0D en 0D 0028:C00559820 EN VXD VMCPD (01)+00000360
>
>with others printers I dont have problems.

It doesn't look like the problem that we usually have with HP drivers (that's exception 10h, indicating a floating point unit problem), but some of the fixes might work. Try the following:

1. Use the driver supplied with Windows.
2. Search the Microsoft KB for "divide by zero" and "10h" and following the instructions in there.
3. Load the latest service pack.