You can avoid console messages writing to your graphics planes and
trashing your CDE session by starting an hpterm and designating it to
receive console messages, and to de-iconify, when console messages are
received.  Put something like this in your ~/.dt/sessions/sessionetc:

# Start up the Terminal Console as iconic, and raise it if any output
hpterm -C -iconic -ls -sb -sl 256 -name Console -T Console -map \
-xrm *mapOnOutputDelay:\ 30 -xrm
Consoleeeeeeee*********clientFunctions:\ -close \
-xrm *workspaceList:\ all &