Re: weird @include problem under Cygwin

[Karl Berry]

As far as I can see, both the command line opening (parse_texi_file in
Texinfo/Parser.pm) and include file opening ($command eq 'include' case
in _end_line, also in Parser.pm) just call Perl's open.  No differing
(or special) arguments.

The main difference is that the include file opening has to find the
include file, which means splitting apart and putting together the file
name path, done in locate_include_file in Texinfo/Common.pm.  Your
message was happening because that function returned undef, looks like
to me.

So if the problem happens again, you could put debugging stuff in that
function to see why it was failing.  Else I see nothing to do ...

K