Consider the following scenario. You perform one of the following actions in Microsoft SQL Server 2005:
- You restore an msdb backup.
- You attach an msdb database.
- You change the information in the syssubsystems table in the msdb database.
The paths to the SQL Server Agent subsystem DLLs are stored in the msdb.dbo.syssubsystems
table in the msdb
database. The locations do not correspond to the current locations of the binaries for the instance of SQL Server 2005. In this scenario, an error occurs. The following error message may be logged in the SQL Server Agent log or in the Job step history:
Subsystem %s could not be loaded (reason: The specified module could not be found)
When this error occurs, jobs may fail. Additionally, the following error message may be logged in the Job steps history:
Unable to start execution of step 1 (reason: The %s subsystem failed to load [see the SQLAGENT.OUT file for details]; The job has been suspended). The step failed.
The following error is logged in the SQL Server Agent logs:
2006-01-24 14:02:41 - !  Subsystem %s could not be loaded (reason: The specified module could not be found)