Several JES2 installation exits, such as installation exits 27 through 35 contain a condition byte that provide a means of passing information to your exit routine. JES2 sets this byte to indicate the status of the environment at the time the exit is called. Check the bit settings in this byte to determine what (if any) processing should be done by your exit routine. See the “Register Contents When The Exit Routine Gets Control” section of each exit description for the meaning of the condition byte.