RBE3 crashes with some combinations of DOFs

[victorkemp]

Found by Brian with Claude. Called BUG4.

 *ERROR  2201: THE RMN PARTITION OF CONSTRAINT MATRIX RMG HAS            0 TERMS IN IT.
               THE NUMBER MUST BE > 0.
               THIS PROBABLY MEANS THAT THERE WERE NO N-SET DOFs THAT THE RIGID ELEMS & MPCs WERE DEPENDENT ON

rbe3_series_07_rotation_only_dependency.bdf.txt