Remote vi first call very slow

My sequences include multiple call to vi's on a PXI chasis. The PXI is running Labview. The first time a step with a remote vi executes, nothing seems to happen for as long as 30 seconds. Subsequent executions of the same step occur instantly unless the module code is unloaded. My hunch is that PXI Labview is searching for all the subvi's of the remote vi. Optimizing the PXI search path may have helped a little. But what helps enormously is to explicitly call the PXI Labview vi server within a code module running locally using vi references. In this case even the first call is apparently instantaneous. Has anyone experienced this? Does anyone understand it?
Solved!
Go to Solution.

Hi htan,
I believe what ken was refering to when he mentioned explicitly calling the vi from a local code module was that he had created somewhat of a wrapper VI which uses a VI reference in order to call the remote VI. He then instead referenced his local wrapper VI from his Teststand sequence.
I will try to address your question posed to CorbinH on how his first suggestion will be beneficial. I believe his suggestion on creating a source distribution was aimed at getting all the VI dependencies in the same location on the local machine. This would hopefully allow all of the VI dependencies to be located quickly as they will all be located in the VIs current directory rather than searching in various directories and on the remote machine.
Creating a Source Distribution in Labview:
http://digital.ni.com/public.nsf/allkb/F3DC40A6E3F3B25B862570AD005D1D3D
Justin D
Applications Engineer
National Instruments
http://www.ni.com/support/

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