Error when running software on computers w/o GPIB interface card

[jdallen]

I'm writing some simple GPIB I/O software using the VISA libraries and I'm getting an error when I run the program on a computer that doesn't have a GPIB card. The error is "The application failed to initialize properly (0xc0000142). Click on OK..." The program runs and works fine on the machine that is hooked up to GPIB devices, but I would like to be able to use my laptop for development. I've installed version 2.3 of NI-488.2, so all the required dll libraries are there.

Thanks in advance,
Jeff

[Dennis_Knutson]

Unless you're using all IVI drivers, there is no built in simulation mode. As long as you make calls to VISA that expect a GPIB board, you'll get errors. Even if you had a gpib board, if you write your code correctly, you would also get errors when the board doesn't find an instrument to write to or read from. The only solution is for you to write your own simulation code. Encapsultate your write/read functions with case statements that skip the driver calls and return simulated data.