PDF Reader Error: HRESULT E_FAIL has been returned from a call to a COM component

Hi All,

I created a DLL in VS2015 which is reading PDF. I am consuming this DLL via WebAPI.

But I am getting below error which creating a object to read PDF:

Error HRESULT E_FAIL has been returned from a call to a COM component.

Below the line of where I am getting error :

BaseReader reader = new TextReaderWrapper<FilterReader>(new FilterReader(fileName), chunkSize);