Labview dll does not accept path from web application (.net mvc 5)

[bhavinsave]

I have labview dll which accepts the path for dsx file and does further processing and retruns csv file. This dll accepts the path if passed from console application and works perfectly but if same path is provided from web application, it throws " Object reference not set " error.

Is there any pre requirement to use labview dll in web application ? The dll works on LabVIEW2015 runtime. 

[Alexander_Sobolev]

PC is a state machine. If input data for the program are the same, then output is the same. Are you sure web application sends file name in the same format?

Can you edit dll and display received string?

Are you sure "object reference not set" is equal to "file not found" error?

[bhavinsave]

 @Alexander_Sobolev:  I am seding the exact path in both application. i tried even with exact absolute path like "c:\...(path to file)" but the result is same.

[RichieTheBard]

Does your web application have access to the files in your computer?

Are you able to access other files that are accessed on the computer from this application?