vi works in LabVIEW, but not when executed by TestStand.

[RayFarmer]

Hi,

Try changing the Preferred Execution System to anything other than same as caller or User Interface.

Regards

Ray Farmer

[TheSleeve]

Wow, I am overjoyed.  I changed the Prefered Execution System to Standard, and lo and behold, it works!!!

Thanks very much for your help, Ray and Guenther. 

[RayFarmer]

Hi,

Thats great.

I have attached a modified VI with the error connected as an example.

Regards

Ray Farmer

[GuenterMueller]

Very good job, Ray.

Although my PC has 2 CPUs (which should have made me sensitive to it) I did not see the solution.

Excellent diagnostics.