n is either 1 (true) or 0 (false). The default value is 0.
When LogRollback is enabled (n = 1), InterSystems IRIS® data platform logs transaction rollbacks to the messages.log file (located in the install-dir\mgr directory, or the alternate directory named by the console parameter). When LogRollback is not enabled, transaction rollbacks are not logged.
Changing This Parameter
On the Compatibility page of the Management Portal (System Administration > Configuration > Additional Settings > Compatibility), in the LogRollback row, click Edit. Select LogRollback to enable this setting.
To change this parameter for a single process only (as opposed to instance-wide), use the LogRollback()Opens in a new tab method of the %SYSTEM.ProcessOpens in a new tab class. See the class reference for details.