Greetings,
As this error indicates, a counter can not be configured for two operations at one time. So, you can assign the properties for CWCounter and CWPulse, call CWCounter.Configure, perform your counting operation, call CWCounter.Reset, and then call CWPulse.Configure. Since you want the counter to output a pulse when it finishes counting, you will need to reset CWCounter before you configure CWPulse.
Good luck with your application.
Spencer S.