Generally I recommend not relying on Sleep() or prompting for "press a key" when debugging, as the script can abend before you get that far.

Sometimes you need to run something live where the error is intermittent or unpredictable. In this case I wrap the script in a very simple batch file. The batch file checks the error exit code from KiXtart, and if it is not a specific value then I pause the batch file or mail debug info. If KiXtart exits unexpectedly the exit code is not set so it triggers the event.

I've also done the same thing where the batch script creates a file then calls the KiXtart script. The KiXtart script deletes the file just before it exists. If the batch file sees the script is still present then something must have failed, and again I pause the batch file or mail debugging information.