Axial Release End RAM Elements

I'm modeling the girts for metal panel backup on a building, and I want to have a slip connection at the head of my jambs (i.e. i don't want to prop up the girt).  Is this possible to model?  The "AXI"  release toggle on these elements makes it such that the model fails to converge.  

The jambs should transmit shear into the continuous girt at the head but not moment, and should only accumulate axial load from the girts/headers they support and take that load to the base.