Are there any limitations to using the move face command? I am asking because I am unable to move/rotate a face/faces saying that "Failed to move face(S) by specified parameters... Try redicing the specified distance/angle..." I do not understand as to why I am unable to move the 3 faces or even 1 face. The part is available here. I was hoping to move the 3 faces so it wont intersect with the front surface and then fill the gap between the surfaces. Can some one help me achieve this goal, where I have a back surface that does not intersect with the front surface? Ideas/Suggestions if any?

Thanks

N