When trying to view documents in QView or QBlaze the Viewer is not showing anything other than a white screen and you see the following error in the QView logs.

Critical Unhandled Application Exception : Activation error occured while trying to get instance of type IOixControl, key ""


Exception is: FileNotFoundException - The specified module could not be found. (Exception from HRESULT: 0x8007007E)


Verify these versions of Visual Studio C++ are installed in Control Panel:


There are several Visual Studio C++ redistributables needed for QBlaze to work. This problem is presented when one of these is not installed or failed to install properly. Typically the 2013 x64 version is the one missing.