So by the the name of the missing script, I doubt you would have any human ik scripts needed to import a prop obj. Try to import the file from 3d coat into a new Maya scene. Also check out the outliner to see what nodes are or aren't imported.
Check this link out: https://forums.autodesk.com/t5/maya-modeling/error-hikcharactercontrolsui-mel-line-329/td-p/7101141 Seems like a likely solution for you as well. I don't know MEL (maya's scripting language), but this error code has something to do with humanIK, which is a rigging thing inside maya. Totally unrelated…