Listed below are the most common errors that may be encountered when installing the Blue Pencil 2 plug-in. If you are unable to resolve your installation issues using this guide, please do not hesitate to contact me.
Blue Pencil 2 Does Not Display in the Plug-in Manager
Make sure that BluePencil2.mll (Windows) or BluePencil2.bundle (macOS) exists in Maya's default plug-ins directory or in a directory included in MAYA_PLUG_IN_PATH.
To verify that a directory is included in the MAYA_PLUG_IN_PATH variable, run the following MEL command:
getenv MAYA_PLUG_IN_PATH
Loading Blue Pencil 2 in the Plug-in Manager Fails
When Maya fails to load a plugin, an error is generated and displayed in the script editor. Listed below are the most common errors and the likely cause.
Error: The specified procedure could not be found. (BluePencil2)
The wrong version of the plug-in is being loaded (e.g. loading Blue Pencil 2 for Maya 2017 in Maya 2018). Copy the correct version of Blue Pencil 2 to the plug-ins folder.