Since TestStand 2019, it's possible to configure an action step with a LabVIEW Module to switch between using a source VI and using the same one but compiled into a LabVIEW Packed Project Library (PPL).
The option, accessible in two ways, is called "Always run VI in Packed Project Library".
That's a neat possibility since it's allow to switch between a development version with easy debugging of a classical VI, and an optimized and locked production version with PPL.
One non compiled VI
One compiled VI into a PPL
One LabVIEW project
One TestStand step
However, when LabVIEW Adapter is set to Run-Time, a tight coupling between the compiled VI and the non-compiled VI is maintained for no reason.
Example 1)
-A VI is developed and compiled on a development machine A
-It is called as the module of an action step
-The VI, the PPL, the .lvproj and the .seq are pasted on a production machine B with fresh installations of LabVIEW and TestStand
-LabVIEW Adapter set to Run-Time on machine B
-Always run VI in Packed Project Library set on machine B
--> The execution will not start, since the classical error -17600 appears on the call. The reason is because the LabVIEW cache of the machine B does not contains data from the .lvproj. Simply opening then closing the .lvproj updates the LV cache, which solves the issue. However, it makes no sense to depend of the LabVIEW development environment on this production machine since the LabVIEW Adapter is set to Run-Time and "Always run VI in Packed Project Library" is enabled.
Example 2)
-LabVIEW Adapter set to Run-Time
-Always run VI in Packed Project Library
--> If source VI is deleted, it takes a long time to preload the modules. See here
Proposition :
When the LabVIEW Adapter is set to Run-Time and "Always run VI in Packed Project Library" is enabled, it should be possible :
- To not install the LabVIEW development environment (only the LV Run-Time)
- To keep only the PPL (and eventually the .lvproj) and to delete the source VI (no source code on production machine)
