dbimport fails with a second tape

Hi did we do something wrong? We make a dbexport on a tape, not only one tape, exactly the process needed 2 tapes. No problems so far. And we did it twice (because if one tape could be corrupt). So we have got two tape-sets for making a dbimport after dropping our database. We tried with the first tape-set - it fails with a tape error when the second tape of the set should be inserted. The same happend with the second tape-set. So I have only one question: Does the dbimport command not handle many (in our case 2) tapes of an dbexport? And if the answer is yes, why can't I find any hints in the manuals. Is there a workaround? (Excuse, a second questions) It makes us angry because we invested about 17 hours for nothing to do the dbexport/dbimport. Thanks for any replies. Matthias