Problem in getting vobsub

Hi,

I am having problem in creating vobsub file bother before and after 
transcoding. If I keep the 'after transcoding' option checked, after 
second pass finishes completely I get an error message:

Sat Dec 22 06:37:51 2007 Job 'Transcode - title #2' exited with error: 
Job 'Single vobsub file generation - title #2' failed with error message:
Need IFO files in place.
You must re-read TOC from DVD.
--------------------------------------------------------------------------------


Even if re-read the TOC from a DVD disc or VIDEO_TS folder saved on my 
disk, and click 'create now' for vobsub generation, I get the same 
error! The error message after re-reading the TOC is even more 
interesting, since it says: "WARNING: no IFO files found - vobsub 
feature disabled." Again, in the next line it says: "Copying IFO files 
from {src_dir} to /home/suman/dvdrip-data/traffic_signal/tmp/ifo" !!! I 
am damn sure the IFO files are there in the source directory and I can 
see them ! Here is the complete message:

Sat Dec 22 11:26:48 2007 Start job 'Read TOC (lsdvd|tcprobe)'
Sat Dec 22 11:26:48 2007 Start job 'Read TOC (lsdvd)'
Sat Dec 22 11:26:48 2007 Executing command: execflow lsdvd -a -n -c -s 
-v -Op \/home\/suman\/dvdrip\-data\/TRAFFIC_SIGNAL 2>/dev/null && echo 
EXECFLOW_OK
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Not enabling PSU core, because this movie has 
only one PSU.
Sat Dec 22 11:26:48 2007 Start job 'Read TOC (tcprobe)'
Sat Dec 22 11:26:48 2007 Successfully read DVD TOC
Sat Dec 22 11:26:48 2007 WARNING: no IFO files found - vobsub feature 
disabled.
Sat Dec 22 11:26:48 2007 Copying IFO files from {src_dir} to 
/home/suman/dvdrip-data/traffic_signal/tmp/ifo
Sat Dec 22 11:26:49 2007 Job 'Read TOC (lsdvd|tcprobe)' finished
Sat Dec 22 11:26:49 2007 Job 'Read TOC (tcprobe)' finished
Sat Dec 22 11:26:49 2007 Job 'Read TOC (lsdvd)' finished
Sat Dec 22 11:26:56 2007 Start job 'Single vobsub file generation - 
title #2'
Sat Dec 22 11:26:56 2007 Job 'Single vobsub file generation - title #2' 
finished
Sat Dec 22 11:26:56 2007 Job 'Single vobsub file generation - title #2' 
exited with error: Need IFO files in place.
You must re-read TOC from DVD.

------------------------------------------------------------------------------------------------------------------------------------------


Any help/suggestion/guidance would be highly appreciated!

Next related questions would be: Where does it save the vobsub files? 
How do I get .sub or .srt subtitle files from it?


Thanks and regards,
Suman Chakrabarty.


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