It contains the operation code in the triggering context:
- for an object event, it may be C (Creation), M (Modification... or the button code.
- for a signature event, the code of the rule at the origin of the signature.
- for an import/export, the I/E and S/E combinations (Import/export and Start/Finish), for instance ID.
- to start a function, the field is empty.
- for a printing, it is equal to C.
- for the end of a batch task, it is equal to "0" if the task has been successfully completed, otherwise, the report number followed by the beginning of the error message is used.