Unity3d - Failed to load 'Assets/Plugins/QCARWrapper.dll'

Question

I want to use c++ dll on unity android application. To use native dll on a android device, I learn that I should use Unity 5. I download unity5 from here. My application requires vuforia. So I download vuforia package from here.

Unity 5 is 64 bit.

On unity editor, I delete MainCamera and add ARCamera. There is an error message on unity console. The message is below :

Failed to load 'Assets/Plugins/QCARWrapper.dll', expected 64 bit architecture (IMAGE_FILE_MACHINE_AMD64), but was IMAGE_FILE_MACHINE_I386.
Vuforia.WebCamAbstractBehaviour:CheckNativePluginSupport()

There is a solution for this problem on vuforia forum. But I don't find unity editor(32 bit)

Answer 1

To use Vuforia with Unity 64 bit, just move the QCARWrapper DLLs from /Plugins to /Plugins/x86. These are the DLLs:

• QCARWrapper.exp
• QCARWrapper.lib
• QCARWrapper.dll
• QCARWrapper.dll.signature

This should solve the problem!