When an agent uses external JAR's and something goes wrong (database connect or whatever) it might want to read up its error messages from the property files (bundles) supplied in the JAR file.

If you have set your agent with a to low security setting it will not have access to those property files and you will get a message looking like this:

2007-10-15 13:48:58   AMgr: Agent ('importData' in 'imp\DbImport.nsf') error message: java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key connect_not_allowed

The error you receive is not the root problem but a consequence of your agent not having access to its JAR files properties.

The solution to the above error message is to set a security setting of 2. Allow restricted operations.

Could be tricky to spot sometimes.