AutoCAD Mechanical 2013 (2012, and 2011) all did the same thing. I have accoremgd,acdbmgd,acmgd all set to Copy Local false, Embed Interop Types false, and Specific Version false. My local window fills up with these errors, and I would like to know as well if there is a sure fire way to prevent it from doing so.
Hopefully this will help you - http://adndevblog.typepad.com/autocad/2012/07/supp
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