I came across an interesting anomaly when restoring the 5.1 TSM Database when an external library manager is implemented.
With 5.1 TSM, external libraries are supported using DEFINE PATH. Well, the result of DEFINE PATH does NOT put EXTERNALMANAGER=blah in the devconfig file. What this means is that if you NEED to restore your 5.1 TSM database, you must manually edit the devconfig file and add the EXTERNALMANAGER=blah parameter to the DEFINE PATH. After doing such, my database restore worked normally. FYI Tom Fought OCLC, Inc.