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Labwindows dll crashes labview


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I have a program which needs to run continuously unattended. However, it crashes after random periods of time. I get the error in external code at 0x00 in the vi which uses a particular Labwindows function. It will run the function in the dll fine for half a day or so then crash, which makes me think that it is a memory problem (the function does use malloc and free). Is there a way to catch exceptions in dlls to prevent the Labview program from stopping? I am running a batch file that will restart the vi if it closes but if this dll error occurs the program stops but stays open so won't restart so even a way to close labview entirely if the error occured would be OK. Also, what do people think is the best way of detecting memory leaks in applications?

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