Unsupported Operand error I cannot resolve on my own

Would appreciate some assistance. The following error has sarted appearing when I try and push a file to my tivo:

ERROR : pyTivo.video.video:unsupported.operand.type(s) for :/ 'str' and 'int'

Never had this issue before. Can someone with more programaming skill than I point me in the right direction?

Thanks.

C