client side error: The method "mpp_OnShowProcessPlan" failed. aras_object: "undefined" : "invalid assignment left-hand side" Client Side Error

Hi, How are you doing.? I installed manulally some of the packages like Product Engineering, Project Management into the innovator. after installation, when i come back to innovator to create new item in process plan, it's showing client side error: The method "mpp_OnShowProcessPlan" failed. aras_object: "undefined" : "invalid assignment left-hand side" Client Side Error.

I'm using Innovator11 SP12.

How to resolve it? Thanks in advance.