[boost] [1.45][signals2] Can't build PDF docs?

Subject: [boost] [1.45][signals2] Can't build PDF docs?
From: John Maddock (boost.regex_at_[hidden])
Date: 2010-11-19 08:37:21

I'm trying to build the signals2 docs for the PDF doc distribution, but I'm 
failing with:

warning: failed to load external entity "hello_world_def_code_snippet.xml"
tutorial.xml:50: element include: XInclude error : could not load 
hello_world_def_code_snippet.xml, and no fallback was found
warning: failed to load external entity 
"hello_world_single_code_snippet.xml"
tutorial.xml:52: element include: XInclude error : could not load 
hello_world_single_code_snippet.xml, and no fallback was found
warning: failed to load external entity "hello_def_code_snippet.xml"
tutorial.xml:63: element include: XInclude error : could not load 
hello_def_code_snippet.xml, and no fallback was found

etc...

I can see that process_snippets.exe is being invoked, but I can't find the 
output xml files anywhere.

This occurs if I either build from within the doc/pdf directory, or the 
libs/signals2/doc directory.

Any ideas?

Thanks, John.