compactlogix 5555

Hello all. i have a 5555 controller that is just reading some info from a plc5. i noticed that i had an error with the dh+ module so i started working on that and now the program in the 5555 is not running. it shows its in run mode and i can make changes but nothing will execute. anybody seen this before or have any advice to offer?

you are correct there. it dumped the program. i took the opportunity to replace the battery while i power cycled it which eliminated one issue. my issue now is it is set up to read data from a plc5 with a dhrio card and i am getting "illegal command from local processor" errors on all my messages. any input on that?