Cmdtool runs wild

[Geert J v Oldenborgh]

Occasionally when my little console window (SunView) receives a redraw
event it runs wild:

USER       PID %CPU %MEM   SZ  RSS TT STAT START  TIME COMMAND
gj        6667 93.6  9.6  144  664 p3 R    10:12   1:02 cmdtool -Wp 0 0 -Ws 676 

Any click on it will hang the machine, the only solution is to kill it and
start a new one.  Is this a known problem and is there a workaround?
Configuration: Sun SLC, SunOS 4.1.1.

Geert Jan van Oldenborgh
gj at hep.physik.uni-muenchen.de (Germans *love* long names)