Exception: Access violation (0xC0000005) at EIP=0x73A9B36A

[droval]

Hi,

I am running into this error in a big plugin-based application, and it always occurs in one of the little subVI that has to reorder the waveforms in an array of waveforms.

The main application is a producer-consumer structure, and from the producer I queue 1 event each timeout that has to decodify data and append it at the end of the waveforms. Inside that, there is this little guy that gives the error. It occurs randomly, I cannot predict when or why. I have read 6 possible solutions to this problem on the forums, but none of them seemed to work on my vi. The one that made more sense to me was to avoid the use of "build array", but the results were the same.

Thank you in advance for your help.

[droval]

I forgot, I am using LV14 32bits on a Windows 7 64bit machine. The plugin contains VISA calls through USB for communication to a microcontroller, but that is third-party packed library and works well in other applications.

[rolfk]

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@droval wrote:

I forgot, I am using LV14 32bits on a Windows 7 64bit machine. The plugin contains VISA calls through USB for communication to a microcontroller, but that is third-party packed library and works well in other applications.

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Does that third-party packed library call DLLs? Just because it doesn't crash in one application does mean nothing in terms of correct implementations of the Call Library Node setup or the actual DLL itself!

[droval]

It was not about the dll, I found the problem seems to be with "build array". I was reorganizing an array of waveforms, and it didn't like the part where the waveforms had different length. So I chopped the extra points in the waveforms before the problematic VI instead of afterwards, and the problem hasn't occurred anymore since then. Thank God I didn't need different length waveforms and those extra points were garbage, because if that was not the case I would have had a serious problem. Thank you for your time and help. 🙂