> I saw that the cleaning tape was ejected to the bulk
>I/O area. So I removed it from the library and I placed a new one in
the
>bulk I/O area. The library picked it from there and placed it in an
empty
>cell. I though that that was enough, but apparently not. Is there a
special
>procedure for checking in a cleaner cartridge?
>

You do have to tell the 3494 library what volsers to use as cleaning
tapes.  It's on the 3494 Library Manage Operator menu.
Commands->Cleaning->Cleaning Masks.

David