[CAUSE] The tmnxSysExecStarted notification is generated when the user initiates a CLI 'exec' operation to process a file of SROS CLI commands or processing of 'vsd' configuration messages have been initiated. The value of tmnxSysExecScript indicates the command file when the value of tmnxLogExecRollbackOpType is 'exec' or an empty string when the value of tmnxLogExecRollbackOpType is 'vsd'. The value of tmnxLogExecRollbackOpIndex indicates the row entry in TIMETRA-LOG-MIB::tmnxLogExecRollbackOpTable for this CLI 'exec' or 'vsd' operation. [EFFECT] All change notifications generated after the generation of this notification and before the tmnxSysExecFinished will be logged in the TIMETRA-LOG-MIB::tmnxLogExecRollbackEventEntry. Once the tmnxSysExecFinished notification is triggered, a Network Management System (NMS) is able to walk the aforementioned log table to retrieve the list of all objects that have been modified during this transaction. [RECOVERY] There is no recovery required for this notification.