Error V-79-573-33039

[-jos-]

I am having problem with Symantec Backup Exe V10.1, got error massage from job log for daily backup :  V-79-57344-33039 –Error – Mount failed.                                                                                                                                                                                                                 User Canceled a Physical Volume Library operation

If u got any solution please advice, Thanks in advanced if u can help.

regards

-jos-