There is a known bug with prtinfo() where it will intermittently cause a fatal exception when the 2nd parameter (cPrinterName) is specified. This is fixed in VFP 9. We haven't tested in VFP 6, but we have reproduced it in VFP 7 and VFP 8.

Assuming this is the problem you are seeing, as a workaround you can append a chr(0) to the cPrinterName parameter like this:

cPrinter = <printer name>
lnPrinterPaperSize = prtinfo(2, AllTrim(cPrinter)+chr(0))

The fatal exception occurs when a null termination for the string is not found. Calling SYS(1104) may help ensure that a null termination is found before looking outside of VFP's address space, which causes the crash.

>hello everybody.
>
>This is a quick-fix/workaround for a problem i've encountered for a while now.
>
>i have a extensive printer selection gui (like ms word has), in which the PrtInfo() function is called several times with different parameters. each time the user chooses a different printer, those functions are called again.
>
>on a semi-consistent base i would get a fatal error - always on the PrtInfo() command. never found a solution for this, untill i tried an idea i just got - issue sys(1104) right before each PrtInfo() call.
>
>it seem so far that this has solved my error problem. so for anyone who also got this fatal error - try "sys(1104)" right before the PrtInfo() function.
>
>hope this helps someone!