xdmp.log

xdmp.log(
   msg as ValueIterator | Object | String | Array | Null | Number | Boolean,
   [level as String?]
) as null

Summary

Logs a message to the log file <install_dir>/Logs/ErrorLog.txt. The log message is sent as soon as this function is called, even if the program from which it is called has not completed.

Parameters
msg	Message for logging.
level	One of: emergency, alert, critical, error, warning, notice, info, config, debug, fine, finer, or finest. The default level is "info".

Example

xdmp.log("AAAA");
=> () and sends an info-level log message to ErrorLog.txt with the text "AAAA"