Unsupported format

I have 14 mini DV tapes to transfer to DVDs. So far I successfuly transfered 6 tapes (3 DVDs). 2 tapes on 1 DVD. After a break of two days I continued the job, but when I finished 4th DVD, error message "A disc with unsupported format in drive F:. Would like to know where's problem. Thanks in advance

Hi.. if all the settings were the same it may just have been a bad burn. They happen pretty regularly even with high quality DVDs/CDs. May be worth your while to clean the optical lens and just try again.

Drive cleaning disks are not expensive.