Communicate with HP3235 using GPIB

I try to communicate with HP3235 Switch/Test Unit and I use a PCI-GPIB card and VisualBasic.
I send the command ID? and when I try to read the data from the instrument, an EABO error occurs. But, if I look in the string used to store the information, it contains "HP3235\r\n".
So, why do I get this error even if I receive the information from my instrument?
Thanks,
J.G. Lynch

Hello
I'm now able to read data from my instrument. But, when I send the command "idn?", I must read 4 times to retrieve all data. I use EOS "\n".
See NI-Spy file...
Thanks,
J.G. Lynch
Attachments:
Capture_-_HP3235.spy ‏10 KB

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On Fri, 12 Nov 2004 13:49:31 -0600 (CST), "mrutter@contech"
wrote:
>I have 1 NI PCI GPIB board in my computer
>I have 2 identical devices (keithley 237) connected one at address 15
>one at address 16
>and 2 different programs one program to connect with 15 and 1 to
>connect with 16
>after I tell the 1st labview program to communicate with 15 then I
>tell the 2nd labview program to communicate with 16. then both
>communications come back with error device timeout. one at a time, I
>can communicate find with either device.
>
>Why can't I communicate with two different GPIB devices at the same
>time?

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vix file in UI builder.png ‏213 KB
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