Hello
If you get this error message this is due tape already is present, please verify it using omnimm command
omnimm -media_info "barcode or mediumID"
In such case export nad import tape again.
Also as workaorund you can try to use MCF feature that is so much faster than traditional import tape.
Steps
In the Context List, click Devices & Media.
In the Scoping Pane, expand Media and then expand Pools.
Expand the media poolA set of media of the same type (such as DDS) used and tracked as a group. Media are formatted and assigned to a media pool. with the medium whose catalog you want to copy.
Right-click the medium and click Copy Catalog to File.
Specify the output directory for the MCF file, which will contain media-related catalog data.
Click Finish to start copying and exit the wizard.
The exported MCF file can be transferred to the destination Cell Manager.
Best Regards