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Showing results for tags 'call by reference'.
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Subpanel for a Call by Reference VI
AInvisibleNinja posted a topic in LabVIEW GeneralI'm trying to run a VI using the Call by Reference function, then embedded it into a subpanel in my Main.VI. Once the VI is embedded, I can't use it in the subpanel. It's like everything is blocked and it won't let me interact with any of it. If I use an invoke node and call the Run VI method, this isn't an issue. Unfortunately, this is part of a much bigger application that use Call by Reference functions, so I can't replace those calls. I have attach image snippets showing my code. Does anyone have any suggestions why this might be happening or a work-around to fix it? Thank you in advance!
I am running into an issue where my VI Server connection goes stale after a few hours. Looking for a fast way to detect this and recover. Currently here is what I am doing: On first call, open the application reference and then open the VI reference. Cache both of these. Use the VI reference to call the remote VI. On subsequent calls, test the cached references to verify they are still valid and then call the remote VI. What appears to be happening is the references still appear to be valid in the caller but the connection is broken so the remote call fails. Then I detect this and reopen the app and VI refs and can again call the remote VI. The issues are: The failing remote call takes a long time to timeout and I do not see how to control this timeout. The test of the refs does not actually test to see of the network connection is still good. The result is it takes a long time to recover and this is upsetting the user since it appears the system is locked up. What I need is a way to control the timeout of the 'call by reference' node or a way to quickly test the references to verify the network connection is still good before I attempt the remote call. Any ideas? thanks, -John