Receive "Copy Complete 1 titles saved, 1 failed"

[HairyScot]

Converting a collection to MKV.
On one DVD (iso file) there sems to be a problem with the second title.

On screen log shows :-

MakeMKV v1.7.1 win(x64-release) started
Debug logging enabled, log will be saved as C:\Users\Jim/MakeMKV_log.txt
Using direct disc access mode
Complex multiplex encountered - 6 cells and 10270 VOBUs have to be scanned. This may take some time, please be patient - it can't be avoided.
Title #0 was added (6 cell(s), 1:29:25)
Complex multiplex encountered - 6 cells and 10302 VOBUs have to be scanned. This may take some time, please be patient - it can't be avoided.
Title #1 was added (6 cell(s), 1:29:38)
Operation successfully completed
Saving 2 titles into directory E:/Videos/Judge John Deed
DEBUG: Code 32 at zUY]tDXPhtp'U4CMGCg:29398622
DEBUG: Code 149 at zUY]tDXPhtp'U4CMGCg:213135067
DEBUG: Code 4 at zUY]tDXPhtp'U4CMGCg:213135090
DEBUG: Code 0 at %{<&\Y:cX~;4Nz$`suTqp:213134216
DEBUG: Code 0 at %{<&\Y:cX~;4Nz$`suTqp:213134216
LIBMKV_TRACE: Exception: Error while reading input
AV synchronization issues were found in file 'E:/Videos/Judge John Deed/title01.mkv' (title #2)
AV sync issue in stream 1 at 1:00:33.920 with duration of 192ms : audio gap - 6 missing frame(s)
Failed to save title 1 to file E:/Videos/Judge John Deed/title01.mkv
1 titles saved, 1 failed


Have attached debug log