Expression Error (#:-1074001424) with Keithley 2000 DMM

I wrote a program to that uses the Keithley DMM to check voltages on multiple channels, wait a period of time, and then check again. This cycle continues for the time specified. I made this program on one laptop and it worked fine. When I moved it over to a different laptop and a different Keithley DMM, then I started to see this issue.
After stepping thru the program, It seems that the error comes from the "Configure Scan.vi". The exact error message is:
<ERR> ke2000 Error Query;
instrument reports:
-260,"Expression error"
and the error code is: -1074001424.
I searched for these myself and couldnt find anything helpful. i changed a few things around and it seems that the "scan mode" parameter seems to be the problem. It needs to be set to "internal" to read the channels on the additional scan card, but the program will return an error if it is not set to "none"... and when its set to "none" nothing happens.
Please help me out! Thanks

Nvm.... fixed it. For the Configure Scan.vi, in some cases, one of the parameters, "Stop Channel", would be set to 1, when the starting channel was, by default, set to 1. Apparently this caused a conflict of some kind but I changed my program around so this doesnt happen anymore.

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Here are the results of my investigation into this problem, it’s two fold:
1. Keithley have informed me that their engineers in the US have just seen the problem I’ve been seeing and are working on a firmware update. Currently here is no date for the release of the updated firmware but I’ll be informed when this it’s ready.
Note: I’ve found that the read AC Volts overflow problem only occurs when the read trigger delay is set to zero seconds.
2. The TestStand DMM IVI configuration step always sends a trigger delay of zero seconds regardless of the trigger delay set.
In my TestStand sequence the DMM IVI configuration sets the read trigger delay to 3 seconds but as noted above this is sent a zero seconds thus invoking the Keithley DMM AC Volts read overflow problem.
See attached VISA call log captured by NI Spy. The first 22 call are made when the DMM IVI configuration step is called form TestStand the next 22 calls are made by the IVI DMM sample code configuration provided by National Instruments when DMM configuration is run thorough LabWindows. Note call 12 (IVI DMM TestStand) has the trigger delay set to zero seconds (should be 3 seconds) and call 34 (IVI DMM LabWindows) has a delay of three seconds.
I’ve found a workaround as follows:
After each call to the TestStand DMM IVI configuration step an additional step that calls the TestStand IVI Tools step can be added. The IVI Tools step can be set-up to specifically configure the DMM Trigger Delay to 3 seconds. I’ve proven that this individual call does in fact send the correct trigger delay command to the DMM thus alleviating the AC Volts read overflow problem.
Can NI confirm that this problem does exist with the DMM IVI step and when they plan to fix it. I’ve attached the TestStand sequence file that I’ve been using to investigate the problem.
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Attachments:
DMM Overflow.zip ‏9 KB

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Expression Error (#:-1074001424) with Keithley 2000 DMM

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