Misbehaving GPIB

[LarsUlrich]

You were probably right, all I had to do was replace the driver with your changes and it works fine.  Thanks!

[Dennis_Knutson]

Do you understand the fundamental flaw that was in your subVI? Your intent was to not send a command unless it had changed. Because of this, when you called the subVI a second time for the other instrument with the exact same parameters, nothing at all was written. This would cause a problem with the read since you did not send the command requesting a reading.

[LarsUlrich]

Hey Dennis, I noticed something a little strange in that keithley driver you helped me with (which has been working like a champ, btw).

On the visa read function, you changed the "byte count" constant to 200 (up from 18 I think).  Is there a reason for over-shooting like that?  Just to make sure it doesn't miss something I guess?