Hi Symantec support.
I have experience the same issues as TECH60241
http://www.symantec.com/business/support/index?page=content&id=TECH60241
"Please insert overwritable media into the robotic library using the import command is displayed and the job status Queued during a backup job and overwritable media is available in the library and media sets.
I follow the step 1 and unable to resolve the issues.
And Step 2 from Symantec is not an acceptable solution as it requireq me to retire and delete the tape. I have 1 tape for my weekly FULL backup and there is no way for me to retire the tape and delete all the data on the tape until the next Cycle. Can you please provide me a details resolution how to change the export pending to NO without retire and delete the tape so the remaining job can continues write on the weekly full backup tape?