LabVIEW Application Crashes and Log Shows DWarns 0X0E697B77 and 0x50CBD7C1

Issue Details

I have a LabVIEW application that has been consistently crashing. When I look into the crash logs, I see the following internal warnings:

• 0x0E697B77: Caught an exception in ExtCode call! 
• 0x50CBD7C1: Got corruption with error <error code> calling library <DLL name> function <entry point name>

The DLL called out is being called by a Call Library Function Node in my application. How do I fix this issue?

Solution

DWarn 0x0E697B77 refers to the DLL throwing an exception, usually one that was not properly handled. LabVIEW caught the exception in order to prevent the DLL from crashing and reported it to the user. This is often accompanied by DWarn 0x50CBD7C1 and error 1097 or 1517 from the output of the Call Library Function Node.

In the case of the DLL throwing an exception, the Call Library Function Node will generate error 1097. This can mean that the function parameters were improperly configured, the DLL performed an illegal operation such as dereferencing a null pointer, or a more code-specific problem occurred that generated an exception within the DLL. 

If instead the Call Library Function Node generates error 1517 when called, the calling convention is not configured correctly. Change the configuration of the Call Library Function node to stdcall or cdecl as appropriate (see the Setting Calling Convention section of the Configuring Call Library Function Node help document).
Ensure that the DLL works in the development language and in LabVIEW in a simpler implementation. In addition, ensure that the function parameters are configured properly.