I set up a scheduled script to run at midnight every day to find all cases that have a status still identified as 'New' and a custom field 'custevent_respondbyhrs' greater than 0 (respondbyhrs contains the number of raw hours to first response (taking into consideration business hours response versus 24x7 response, holidays, etc)

The function csiWriteToErrorLog simply writes out the error to the execution log using the 'ERROR' classifier which includes the line number of the error for debug purposes. Interestingly this ends up writing out to the execution log as 'DEBUG' which not sure why (could be my function, but I don't see a problem with it). The function _FunctionResults simply writes out to the execution log using the 'AUDIT' classifier that the function finished and shows an error count if errors occurred.