Hi Moritz, you would get that error if the QuickRotate.js file was not copied over into your commands folder, there are some instructions on where to copy it here: http://moi3d.com/faq#Q:_How_do_I_install_a_plug-in_script.3F

The error happens because no command named QuickRotate was found in the commands folder, and so instead MoI tried running the contents of the shortcut key as script code itself rather than loading it from the QuickRotate.js file.

- Michael