SubVI doesn't work on program restart

[thomas.marcus]

I have a pretty complex main program that calls various SubVIs. All of them work except for the one I attached. Every time I close the main program or the SubVI it stops working in the main program until I open the SubVI, delete a connection and connect it again or delete and write a variable (the same value) and save. Then the main program works as it should.

I really don't know anymore what to do. Is it a bug?

[crossrulz]

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@thomas.marcus wrote:

Every time I close the main program or the SubVI it stops working in the main program...

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What do you mean by "stops working"?  Wrong values returned?  Program halts when calling the VI?  LabVIEW crashes when it is called?  You get a Blue Screen of Death?

[thomas.marcus]

right, forgot to say that. sorry.

it returns NaN.

[paul_cardinale]

Generally, around here, people don't try to debug pictures.  The reason for that is that it's impossible to debug a picture; and no one is going to try recreate a VI from a picture.

[RTSLVU · Accepted solution]

It look's like you don't have the Feedback Node wired correctly...

Try something like this...

[RavensFan]

Please don't post BMP images.  They are way larger than they need to be.

The best image for LabVIEW code is PNG.  JPEG will do in a pinch.  But as others have said, actual VIs are best.

[GerdW]

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@RavensFan wrote:

Please don't post BMP images.  They are way larger than they need to be.

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Using PNG instead reduces filesize dramatically:

[carolynperry]

nice, i will try it

[billko]

Don't get stuck on image size.  Post your VI if possible.

[thomas.marcus]

Alright, I just thought since there are so many SubVIs I don't want to upload them all, and didn't know if it works without them.

Gonna try rewiring the feedback node correctly in a minute.