VSRip - how to rip just one stream?

[bartel75]

I'm trying to extract the idx/sub of a dvd using vsrip.

When I use this as the param file for subrip, it works:
C:\_265\rips\test\VIDEO_TS\VTS_01_0.IFO
C:\_265\rips\test\VIDEO_TS\temp_AutoRip_20090322_21.44.37\test_NEW
1
0
0
CLOSE

However, when I explicitly put the stream IDs, it fails:
C:\_265\rips\test\VIDEO_TS\VTS_01_0.IFO
C:\_265\rips\test\VIDEO_TS\temp_AutoRip_20090322_21.44.37\test_NEW
1
0
20 21
CLOSE

VSRip still reports the operation as successful, but I cannot find any output files... :confused:

VSRip log:
Opening ifo OK
Parsing ifo OK
Searching vobs...
Found C:\_265\rips\test\VIDEO_TS\VTS_01_1.vob
Indexing...
Counting timestamps from 0ms (v01c01)
Indexing mode: File
v01 c01 lba00000000, total=0ms, off=0ms, corr=0ms, discont.:1
v01 c02 lba00268905, total=543360ms, off=0ms, corr=0ms, discont.:0
v01 c03 lba00553021, total=1107000ms, off=0ms, corr=0ms, discont.:0
v01 c04 lba00786942, total=1570680ms, off=0ms, corr=0ms, discont.:0
v01 c05 lba01142025, total=2274720ms, off=0ms, corr=0ms, discont.:0
Indexing finished
Saving files...
Subtitles saved
.chunk file saved
Done!

Same thing happens when I only want one stream, so when I put "20" instead of "20 21".

Anyone willing to help me out here?
Thanks...