The log files you sent help a bit. They contain lines like:
Package hyperref Warning: Rerun to get /PageLabels entry.This explains why no "New xref files" messages are being printed by texi2dvi: the function xref_files_changed in texi2dvi sees that text in the log files and doesn't look in the log files. I don't have those lines in my log files (maybe due to different versions of packages), so what happens for me is different. I still don't know where exactly texi2dvi is quitting in your case, alas. Perhaps the output from sh -x ./texi2dvi --verbose Rd2.tex >Rd2.trace could help? I've attached what I got. Also deleting chunks from the file to get a smaller file that gives the same error can only help. (It would make the log files shorter and possibly easier to spot what's wrong.) NB I don't know if the problem is on my end or yours but I have awful trouble reading emails with long logs in the body of the email: could you try sending any long logs or output as attachments instead? That's if you weren't doing that already and my mail reader (GMail web interface) is displaying them inline).
Rd2.trace
Description: Binary data
