HP StorageWorks MSL2024 failing on cleaning tape

Have an HP StorageWorks Tape Library, on the front panel LEDs, for Clean shows solid orange. 

I have a cleaning tape, HP brand, orange color.  However it doesn't have a bar code on it.  

I've inserted it into mailslot 6 and into the operator mailslot to try and clean.  

However it continues to fail.  I continue to get the following error: "cleaning drive 1 failed, destination full." 

I'm not sure what this means.  

thanks