'???Unknown Value>

[BryanS]

Hi All,

I need some assistance with a LabVIEWIO Control Container in TS.  For an unknown reason to me, one of my input controls is being shown as " '??? Unknown Value>" even though that particular instrument is shown in the "variable pane"? Note also that the instrument is working correctly throughout the entire test, thus MAX,VISA,LV are functional.  The only thing occurring in this particular VI is clearing of the handles.

Kind Regards,

Bryan

[BryanS]

Hello again,

In researching a solution to this problem I found this link:

http://digital.ni.com/public.nsf/allkb/3388F975962A5C8C8625766D0047FDF1

and this link:

http://forums.ni.com/t5/NI-TestStand/Some-controls-in-container-not-connected-automatically/td-p/821...

Neither of which help me resolve my issue.

I followed the guidance of both, my mapping is set up correctly, but still '???Unknown Value'.

As a note, I'm running TS 4.2.1 and LV 2010.

Regards,

[Daniel-E]

I've been working with Bryan via email, and I think we've figured out what was happening here. To pass a TestStand container as a cluster in LabVIEW, a custom data type must be defined in TestStand corresponding to the cluster. This data type also has to contain information that allows TestStand to pass the cluster to LabVIEW, such as the name of each element in the cluster. If one of the name labels in this particular VI had been changed, that element of the container would not be passed correctly from TestStand.

Deleting the cluster from the VI and re-adding it was sufficient to resolve the issue.