Troubleshooting Error Return Code 1104 (MS_TMM_OPEN_UNSUCCESSFUL)

Summary

This article provides suggestion for troubleshooting errror return code 1104 (MS_TMM_OPEN_UNSUCCESSFUL).

Resolution

1. DPX is unable to open the tape drive for access. This may be a configuration problem, make sure that the Device ID for the tape drive is correct.
2. This error may be the consequence of a bad batch of tapes. Try labeling a known good tape.
3. Use the tapedump utility to test the open command when a tape is loaded in the drive.
4. Confirm the tape write-protect switch is not engaged. This return code may be seen when restoring from a write-protected tape. Tape Verify may also fail when the tape is write-protected.