I am getting the following error message:

Couldn't complete the last command because of a Mac OS Error........Result code = -7

when trying to work with some of my DVD-RAM discs that I use with my Panasonic DVR.
I will record, normally, two shows (1 hour each) that I will then import into Toast and make a menu driven disc.

Title 1 will import fine but Title 2 will give me the error.

Unfortunately, it does not give me the error on all discs.

Any thoughts??