Sign on to your Ideal environment and execute "D OUT ALL STA" command to see if your ADROUT VLS file is full.
If so,delete some of the old outputs.
ADROUT is usually the one file that causes a random error.
If your IDEAL application user is hitting the PF3 key,it prints the screen to the ADROUT file.
If that does not help then open a case with CA Support.