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Memory full error shared variable

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Hi,

we develope large Labview applications with large data sizes.

 

In one Application we get a "Memory Full Error" and the Application crashes.

But we don't know why.

 

We use a lot of shared Variables and a few of them are large data arrays.

A few Single Arrays with 300000 size (unbuffered) are read and written very often (every 100ms).

 

Can this be a problem for  memory full error?

 

Thanks

Hans

 

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Hi Hans,

 

 

which version of labview do you use, 64Bit or 32Bit, the problem is LabView 32Bit can only use max 3,5GB Ram on a 64Bit System and 64Bit LabView can use 16TB

 

http://www.ni.com/white-paper/10383/en/

 

Maybe you can take a look at the memory blocks used for LabView https://decibel.ni.com/content/docs/DOC-12427, you can drag and drop the png from the community example into a LabView VI.

 

I don't which datatype you write to array, maybe you can calculate the maximum memory size of your array functions so you can see how many memory you are using

 

Best Regards

Dominik

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Hi Dominik,

thanks for your reply.

 

This application uses Labview 32bit.

 

I've checked the example from your link to get the free available contignous memory.

Thanks for this. Maybe I can use this in my application to log the free memory to see what happened before "Memory full" occurs.

 

Mainly we read and write large single arrays (size: ~300000 Elements). Also with shared variables!

 

I've checked the shared variables access with the Buffer allocation profile tool from Labview and it seems that to write a shared variable makes no buffer allocation.

But maybe in the Shared Variable Engine? - Can this also cause a memory full error?

 

Normally the "Memory Full" error tells which VI has caused it, or? In my case not.

 

Thanks

Hans

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Hi Hans,

 

maybe this paper can give you an answer of all your questions.

 

Using the LabVIEW Shared Variable

http://www.ni.com/white-paper/4679/en/

 

Best Regards

Dominik

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Hi Dominik,

thanks, I've checked it and it's very useful.

 

Thanks

Hans

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Hi all,

I've found out that the "Search Variable Container" VI produces the memory leak.

 

Since I use this periodically in my program this is a problem for me.

 

This seems to be a problem of Labview 2013 SP1, or?

 

Hans

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