Problem(s) Encountered:

We are observing remotely. When using imexam in IRAF, sometimes when we enter a letter (ie. normally r) the computer acts like we are repeatedly entering the letter. Sometimes, this seems to cause the VNCviewer to freeze. 

In order to resolve the problem, we quit the VNCviewer and control+C in the terminal, then restarted the VNC connection. This seems to resolve the problem. When we return to IRAF there are many many  r s. 

Rest of the night we didn't have any issues with IRAF/imexam. However the same issue arose on Tuesday night.

Solution:

See above.