problem with library call function; exception occured with external call library node

[toofast4u]

Hello,

I'm having this problem with a library function of mine. The wierd thing is it will work sometimes, about 3 or 4 times, then all of a sudden I get the error. Here is a screen shot of what the error is. I get this will all the library functions. Any ideas what can be causing this intermitnent problem to come up?

[Lycangeek]

Well, the error message is generated by LabVIEW if any SEH exception is thrown from the DLL, so something inside your DLL is having problems. This could be an access violation (NULL pointer access, bad address, etc), out of memory, etc. Any type of exception that could be thrown either by you or the system.

Assuming this is a Windows system and you have the source and VS debugger, you can tell VS to break whenever any exception is thrown.

[NIDave]

I received that error before too. The one problem I found that fixed if that my C code was not declared as external. (extern if I remember correctly) However I noticed that in the bottom of the CLF dialog where it has the function prototype there are some odd characters such as "@@YAHHPAEH@Z" and others. IF thats there Id research that option otherwise run the memory monitor vi and check for a leak and also ensure all our calling parameters are correct as that will cause that error too.
Hope this is helpful.
-Dave

heres my old thread on it:
http://forums.ni.com/ni/board/message?board.id=170&message.id=95609&requireLogin=False