www.makemkv.com

I put the disk in. The DVD drive spins up and launches my default movie player software. I close that. MakeMkv is already open so I click on file/ click on open disc and select my DVD drive/ Make MKV begins to attempt to open the disc and gives the following output:
Using direct disc access mode
Signature is invalid in IFO file
Signature is invalid in IFO file
Signature is invalid in IFO file
Title #1 (2:10:25) was skipped due to navigation error
Title #1 in broken titleset was skipped
Title #2 in broken titleset was skipped
Title #3 in broken titleset was skipped
Title #4 in broken titleset was skipped
Title #5 in broken titleset was skipped
Title #6 in broken titleset was skipped
Title #7 in broken titleset was skipped
Title #8 in broken titleset was skipped
Title #9 in broken titleset was skipped
Title #10 in broken titleset was skipped
Title #11 in broken titleset was skipped
Failed to open disc
Just in case its needed here are the specs on what I am using:
Dell Precision T5400 2x 4core workstation
Windows 7 Enterprise 64 bit
MakeMKV: v1.8.13 [win(x64-release)]
GUI version: v1.8.13 [win(x86-release)]
Keep in mind I have converted over 600 discs using this setup. This is the first one that I have seen with this error. Any suggestions would be appreciated