Hello, In AppleScript and many other programming languages one can throw deliberate errors of a specific kind as well as catch-trap for specific errors. I'm having a hard time determining how to do this in bash 3.2 with it's 'trap' command. For instance, a very simple example in AppleScript... try error 99 on error 99 say "Caught expected error." end try say "doing more tests..." Moreover, I can't figure out whether or not if it's even possible to catch for specific thrown errors defined by a scripter in bash. My own tests have led to a dead end and I haven't come any better understanding from reading the bash info docs, and numerous online and in print examples of the 'trap' command. Basically, I wish to... 1. First of all, have scripts throw a specifically, identifiable, unique error when a certain known bad state has been encountered that they can't handle. 2. Secondly, to able to test for whether scripts are throwing an specific error under a certain condition. 3. Trap for and catch only that specific error and then keep on going, performing further automated tests. Is this possible in bash? Below is an example which might better illustrate what I've attempted to do. It unfortunately, doesn't do what's needed at the moment. i.e.- It will catch all errors and exits but not a specific one. #--- The example below traps all errors but not the specific one. particular_function() { current_status="some known bad condition" if [ "$current_status" = "some known bad condition" ]; then # Encountered some known condition we can't handle so throw specific error. echo "Encountered a, we knew this would happen, type error." exit -99 fi } test_method_for_expected_error() { trap 'echo "function threw expected error code as it should."' EXIT particular_function } test_method_for_expected_error echo "Continued passed caught error as desired and continuing further tests..." #--- end of example Thanks, -Anthony