Problem(s) Encountered:

I tried moving with commands from the MDM13 control system - point ra=10:01:33 dec=+74:24:45 , or actually the J2025 coords, since the TCS lives in the present -- and got a POINT error briefly in the status page, 

Error point illegal Dec90

and when I played around with it and tried something a bit farther north still,  Error point illegal Dec91 .

Solution:

I forced a re-initialization of the encoders and tested successful to dec +80.