Hi, I'm working in ProE (wildfire 3) on a model of a glider. I started with an assembly and made all basic parts there. Now I wanted to move into more details so I opened the wing part and made a cut for aileron and also saved this cut as separate part. Now when I try to put this part (aileron) into assembly and connect it to the wing with pin connection I get an error "selected axis in first constrain is in the ground body" and connection cannot be established. How can I solve this problem? Is my approach wrong (working in assembly then modifying and saving new part and putting it back to assembly?). Thanks in advance for any help.
Mike