I am using unity 5.1.0f(64 bit) and Vuforia SDK Version: vuforia-unity-5-0-5

The web cam is operating normally in windows but in unity in Play Mode not.

I am getting an error message "failed to load QCARWrapper.dll: expected 64bit architecture..."

Can anybody help out solving this issue?

  • \$\begingroup\$ Can you try moving the QcarWrapper files from /Plugins to /Plugins/x86? \$\endgroup\$
    – SanSolo
    Oct 31, 2015 at 4:08
  • \$\begingroup\$ @SanSolo : Plugins/x86 is this a folder in the project? \$\endgroup\$ Oct 31, 2015 at 4:20
  • \$\begingroup\$ Yes, in unity. You need to create sub folder Assets/Plugins/x86. \$\endgroup\$
    – SanSolo
    Oct 31, 2015 at 4:20
  • \$\begingroup\$ @SanSolo : Its still not working. The camera out is not displaying.Its showing the same error. \$\endgroup\$ Oct 31, 2015 at 4:39
  • \$\begingroup\$ This question has been answered multiple times, simply google a bit and you would have gotten the exact same answers. \$\endgroup\$
    – TobiasW
    May 11, 2016 at 7:31

1 Answer 1


Vuforia 5.0 supports the 32bit version of the Unity Editor on Windows, and the 64bit version on Mac.

So, There are two possible solutions:

  1. you just need to install and use the Unity 5 32bit Editor, on Windows.


  1. Create a new folder "x86" inside


    inside your unity project structure Then move the following files from "Plugins" to newely created "x86" folder.

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

After that check log message, If you see the log like:

Setting platform to 'Editor' for plugin: Assets/Plugins/x86/VuforiaWrapper.dll
Vuforia.EditorClasses.ExtensionImport:UpdatePluginSettings() (at Assets/Vuforia/Editor/Scripts/ExtensionImport.cs:43)

Then , Congrats !! You are ready to Go!

FYI More Info:

You need to use the Installer to download and install the additional Android support component, by selecting it from the list of the available components in the Installer wizard;


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .