Labview call a dll generated by labwindows

[XiaomingSu]

I'm trying to call a dll that generated by CVI

CVI use  LoadLibrary to call another dll compiled by C.

==================

point = LoadLibrary("MXIO.dll");
==================

While I call the dll in labview,  always popup a window that show "point null " and labview break down.

If I use CVI call the dll, no error showed and running ok.

many thanks your help.

[Crazywu]

错误I/O操作在函数中仅执行一次，在错误输入节点后不会执行。 如动态DLL的路径不存在，可返回错误7。 如该函数调用的外部代码包含异常，可返回错误1097。

[edjones93]

Hello,

Could you provide a screenshot of the point null you are referring to and how LabVIEW breaks down?

Did you specify to export the symbols in LabWindows prior to creating the DLL?

Best regards,

Ed