Problem(s) Encountered:

The filter wheel got stuck. The error asked us to check/reset filter wheel.

From experience, we went out to the telescope to see if the connection lights were on.  They were.

Solutions:

We ended up restarting the filter wheel. Which after we Re-initialized Xmis

as well, seemed to fix our problem. However, the BG38 and U filters remained red on Xmis window.  I think pressing Reset filter wheel would have solved that problem, but since we were observing in V and gg420, we did not want to risk another stuck filter wheel, so we went on with out observations.