unable to speak with the HP34401A per my soft, despite it is possible with MAX

[Hideaki]

I've tried to change the address, but it dosn't work. I always have the same error at the same point (opening of the VISA's session by the NI driver).
I don't understand why it work with MAX, and not with the driver. I'm sure that I forget something but I can't put the finger on it(parameter of Labview, install, ... ??).
do you have any idea?

[LesHammer]

MAX may be more forgiving on GPIB interface numbers - since it has a list for you to choose from. On the other hand, programs don't assume default interfaces so you need to be more precise.

Les

[maymaythar]

Post your vi to the forum and somebody can help you out.

[Bill Choy]

Can you talk to the 34401a with the example program provided by the driver? Maybe you can try to re-install the VISA driver which can be found from NI website. Make sure you download the right version and OS of the driver.

Bill

[Hideaki]

I'm sorry, but I don't really get what you mean.

[Hideaki]

I sent it, but I really don't think that there is a problem with the VI, because I've tested it on an other computer.
even ths simple VI doesn't work (I simplified it for the debug).
I think that I've a problem with the VISA installed on my computer...but I can't resolve it...

[Hideaki]

I've tried to use the example VI found on the driver library but it didn't work. I still have an error at the opening of the VISA session.
I'v tried to reinstall the VISA 2.5 many times. But the VI still bug at the same moment as before.
I'm sure that it is the right version of the driver, because I've tried with the default driver installed with Labview, and with the driver, for the Labview 6.0, find on the webste.

[Bill Choy]

I tried your program and it works properly. Have you tried to change the GPIB cable and GPIB card although this is not a possible solution? I think re-install LabVIEW on that machine is the last thing you can do.

Bill

[maymaythar]

Check your HP34401A init vi. Compare with the attached picture. Think that would be the possible reason.

[Hideaki]

I do not think that the GPIB card nor the cable or deadm because if it asm I couldn4t speak with them with MAX.
I4ve already re-install Labview 3 times yesterday... I am desesperate...