Ketihley 2400 VISA GPIB Error 0xBFFF0011 with one Win XP User but not the other

[Ocanamat]

Hi all,

I am getting a VISA resource error while trying to communicate with my Keithley 2400 with GPIB and VISA Interactive Control via MAX's "Open Test Panel"

Error opening resource:
GPIB0::27::INSTR
VISA:  (Hex 0xBFFF0011) Insufficient location information or the device or resource is not present in the system.

However, this happens only for one of the Windows XP machine users (User A, see attached). All the other users are able to communicate with the instrument via MAX and VISA Interactive controll without problems (User B, see attached).

The system configuration is

- Windows XP

- MAX 5.3

- VISA 5.2

- LV 2010 f2 & 2011

- GPIB Bus: Keithley KPCI-488. Driver Ver 8.3

I've already tried updating both VISA and MAX with no success. The K2400 has an alias and correct GPIB address, and all of our lab VIs work well with user B's profile but started recently failing under user A's profile with the error given above from MAX/ Visa Test Panel.

Thanks and regards,

[Albert.Geven]

admin right differences between the users?

[Ocanamat]

No, both users have the same Administrator rights.

[Albert.Geven]

Then the only other idea I have is a difference in the user based max settings.

maybe check both userprofiles for this.

[Ocanamat]

Hi Albert,

I have tried one more thing. Upon restart the first user to try to access MAX and the GPIB bus will always result in error. However, by keeping the first user logged in to the machine while switching to a second user will result in the second user being able to communicate susccesfully with the GPIB instruments via VISA and MAX. This happens independently of which user logs in first to Windows.

Is there any service and/or background process that might be launching upon the first unsucessful GPIB attempt that might be then being used by the second logged in user?

I will look into MAX's user profiles. See if there is any difference between the two.

Regards,

O