Run-time error handling in Process Editor is not scoped as it is in Visual Basic. If an error occurs in a user-defined function, and that function does not have an error handler, then any error handling in the caller is NOT activated. Instead, the run-time error causes immediate termination of processing.

Control may fall through into an error handler, but in this case, you should not try to execute a Resume or Resume Next statement, as that will cause an immediate, untrappable run-time error.