Some libraries allow setting for 6- vs. 8-char volser handling: I
don't believe that the TS3100 does.

Two other things that come to mind to check are:

- That the appropriate type of device driver is being used with the
library, and that it's level is sufficient for the generation of tape
currently being employed in the library.  A wrong type of driver would
certainly result in functionality problems; and one that is too old
would not recognize modern drive parameters and cartridge designations.

- That the barcode scanner is operating properly for conveying label
media type to the host through the device driver.  Check out the
library status from its interface, to assure that all components are
operating properly.

Beyond that, you may have to confer with TSM Support to uncover the
issue, particularly given the generic ANR9999 interception.

    Richard Sims