Program fails to open a disc or crashes, what should I do? - MakeMkv

If you were trying to open a DVD disc, please copy all *.IFO files from VIDEO_TS directory and compress with archiver program of your choice. If you were trying to open a Blu-ray disc, please copy all *.CLPI files from BDMVCLIPINF directory and all *.MPLS files from BDMVPLAYLIST directory, also compressed with archiver program of your choice.