Woodstock, thank you.
I just tried to convert my problem disk again. In data folder of MakeMKV was appeared new svq-file and... о miracle! All process was finished correctly. Super!
Sorry for stupid question perhaps...
How can I know that the problem with my non-convertible Blu-Ray disk (errors about no FUTs were obtained) has been solved (or not solved still)? Only starting conversion again and again? (I have sent "dump" earlier.)