AutoCAD Error Aborting

I am recieving an "Internal Error: Attempt to access AecScheduleDataServices after shutdown!" when AutoCAD 2012 gets shut down, the error is not file dependant.

Any recommendations?

Is your version of AutoCAD legitimate, or is it a cracked copy? It seems like it's looking for AEC objects (custom objects) but isn't finding them.

Do you have AEC installed?

It sounds like it's trying to access something from AEC and it's obviously not finding it, do you have any lisp routines running?

Anything customised in your cui?

That's about all I can think of that's not file dependant. (unless it's an object that's in all of your drawings/templates.

When does the error occur?

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