Using HP34401A in LabView yields error code -1073807343

[aywl17]

Hi all,

I used the HP34401A Single Read Example.vi to read data from HP34401A.  However, the following error occur,

'Error -1073807343 occurred at VISA Open in HP34401A Initialize.vi->Untitled 1

Possible reason(s):

VISA:  (Hex 0xBFFF0011) Insufficient location information or the device or resource is not present in the system. '

I am using NI GPIB-USB-HS and I can communicate with HP34401A in MAX.  

I can't figure out why this error happen and how to solve it.  Please help me.

Thanks a lot. 

[Dennis_Knutson]

How are you selecting the VISA Resource Name? You should be clicking on the arrow on the right side and selecting from the list.

[aywl17]

I can't see the GPIB under the VISA resource name.  

[Dennis_Knutson]

What do you see? What program in MAX did you use? There are two.

What version of LabVIEW and what version of NI-VISA?

[aywl17]

VISA resource name do not show anything for me to choose as shown in VISA resource name.bmp.

I am using Labview 8.2.1 and theh version of NI-VISA is 4.3

I am using the Communicate with Instrument funtion to communicate with HP34401A.

Please see the attaahed graph.

[aywl17]

Below are the attached graph

[aywl17]

One more graph.  Thanks for your help.

[Dennis_Knutson]

You are not using the VISA utility in MAX so that is why it is working there.

VISA seems to be installed. You can try deleting visaconf.ini (search for it) and doing a new search for instruments. You can also updating NI-VISA.

[aywl17]

The computer cannot find the visaconf.ini. and I am trying to update the VISA.

Moreover, are there any ways to communicate with HP34401A in LabView without using VISA?

Thanks

[Dennis_Knutson]

Yes, if you use the low level GPIB functions.