BD Ripper (3D Plus) Error creating second file.

[jim_chand]

I am using BD to mobile to convert Avatar to an AVI file. Using all preselected settings. Only changing audio selections. I successfully created the first file using AC-3/5.1 sound. Now I want to try using DTS selection. Getting the following message:
Work 1 failed. Error - 504.00 1 2
Anyone know why I can't create a second file?
This same thing happened with Sherlock Holmes trying to create a file more than once.