The agent runs perfectly when executed from the menus, but fails when run on a schedule. I have traced the problem to the following line:
db = session.GetDatabase ("ServerName", "DBName", False)
The db object is null when run on a schedule. I have set runtime security (via the 2nd tab in the agent properties) to every available setting with no effect.
I have tried leaving the ServerName parameter blank:
db = session.GetDatabase("", "DBName", False)
I have tried specifying the ServerName parameter as follows:
db = session.GetDatabase (session.CurrentDatabase.Server, "DBName", False)
Nothing seems to work, and I have exhausted both my abilities and my patience. Do you have any suggestions?
Otherwise, it sounds like a security-related issue. If the ID signing the agent does not have rights to open the target database, then the db object will not be instantiated.
Here are a few things to check:
- Ensure that your code actually includes the word "set" before "db", because you are trying to instantiate an object handle, so that keyword is needed.
- Ensure that the session object is instantiated properly.
- Ensure that the agent is not using any UI classes (which would cause any background agent to fail).
- Verify the agent's runtime security level to be appropriate to the type of actions it's performing.
- Try re-signing the entire database design with the same ID, just to be refresh the signature.
- Try signing the agent with another ID (preferably the server's ID) that has rights to access the target database. This could at least help confirm whether it's a security issue and not a code issue.
If all else fails, read through Julie Kadasevich's articles on troubleshooting agents at IBM Developer Works.
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