archecker verify backup

Hi there, Having a problem here . I'm trying to verify backup created by ontape using archecker -tvs . In the log file found ...... ERROR: Extent overlap in dbspace 5 between mis:mo1m and FREE ERROR: Extent overlap in dbspace 5 between FREE and mis:mo1n ERROR: Extent overlap in dbspace 5 between mis:xxidx1 and FREE ERROR: Extent overlap in dbspace 5 between mis:qc32idx1 and FREE ERROR: Extent overlap in dbspace 5 between FREE and mis:t_geneprodprocessidx1 ERROR: Extent overlap in dbspace 5 between mis:mo3f1 and FREE STATUS: Finished checking dbspace dbs1 (status = Pass). STATUS: Table checks PASSED TIME: [2014-06-23 10:23:55] Checking Completed STATUS: Tables/Fragments validated: 1457 STATUS: Archive Validation PASSED. STATUS: archecker completed Validation pid = 22968 exit code: 3... ----------------------- Try to retore table mo1m(the one indicate extent overlap ) from tape , it succeed without error. Anything wrong with my backup? Did the backup succeed ? any messages from you will be appreciated . tks Daisy