Fluent interactive blanks out!
 

I am running a big mesh with 8 parallel CPU's on one UNIX machine. the screen of interactive fluent goes blank and I can not see anymore what are the outputs of the program on the window.

1. Why this is happening?
2. how can I prevent it?
3. How can I refresh the screen to see the prompts?
4. Or how can I save the screen outputs to a file so I can open and see what is cooking there?