Deployed DLL with embedded .mat file failed to LOAD file on runt-time

We made a DLL to be used with a C# application. The DLL has be created with a dependency (.MAT file) that is attached with the DLL. On particular instance, the mat file is load during the function call. However, in some instance, we got errors which as per our error handling (Try catch statements) reveal that it was unable to load the MAT file. 

How can we make the call more robust? How to prevent such issues? We do not want to disclose the content of the MAT file. Please advice.

[Mohammad Sami]

You can make the path of the mat file that you are loading more explicit.

[Rajeev Yadav]

but it is within the DLL and MATLAB uses a temp location ... or memory locations or tmep folder, how to know that

[Jakob B. Nielsen]

What is the folder location of your dll, your C# app and the .mat file you want to load, respectively? And what path do you specify to load from in the dll?

[Mohammad Sami]

I meant you can put in a permanent directory, perhaps C:\install\abc.mat. You can then load it from the fixed location easily.

If you wish to debug, you can print out "pwd" in the log to see which folder the dll is taking as working directory. It maybe the same directory as the location of dll file. In that case you can place the mat file in the same location as the dll file.

[Rajeev Yadav]

Thats a great idea. But I do not want to reveal the information in the mat file. If there is way to encrypt ... if yes, then I can provide a static path.