Sue,
the way to fix this is to put the following in the Document Preamble
of the main file (Document > Settings > LaTeX Preamle - insert it
either at the start or end, doesn't matter):
\newcommand\Prefix[3]{\vphantom{#3}#1#2#3}
What happened is that the author of the child document put in a
custom definition in the preamble of that file, which is not defined
at the top level (in your main document). That's the line I copied
above. With this line added to the main preamble, everything compiles
fine here.
The reason for this problem is that the "Child Document" feature of
LyX is really simplistic. It doesn't seem to merge the preambles of
the included documents. And of course that would be really hard to
implement correctly in practice, so I think all one can say is: use
this feature with caution.
Jens
On Dec 1, 2006, at 5:10 PM, Sue Kientz wrote:
Jens,
I've done as you suggested. It is in the child doc. with the new
changes, which has a lot of equations. I attach here the parent doc
and the recalcitrant child doc. As mentioned, the child doc by
itself will generate a PDF just fine.
<pdf-gen-prob.lyx>
<materials.lyx>
"materials.lyx" must be in a subdirectory of the parent file and
named "materials," or you must browse and select the file again.
Thanks for any help.
Sue Kientz
On Dec 1, 2006, at 4:21 PM, Jens Noeckel wrote:
On Dec 1, 2006, at 3:10 PM, Sue Kientz wrote:
On Dec 1, 2006, at 1:34 PM, Jens Noeckel wrote:
On Dec 1, 2006, at 1:04 PM, Sue Kientz wrote:
I had a set of related .lyx documents, a master and bunch of
child documents, which were working fine as far as creating the
PDF until someone changed one of the child documents. Now I
cannot generate a PDF of the entire work. I get "Undefined
control sequence" errors (about 40 of them), e.g.,
...symbol{\sigma}}\,,\label{eq:5}\end{gather}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Now I've tried adding an inconsequential change to the master
document, opening and closing LyX, and every other trick I've
used this last 6 months working with this program, as I have
learned that many times the error messages tell you one thing
is wrong when it's something completely different. FWIW, the
child doc which was changed will generate a PDF just fine. In
fact, each child document that I've tried generates a PDF with
no trouble. As I said, only the one was changed. I'm using
1.4.3 on Max OS X.
Any fix, tips or lyx voodoo would be greatly appreciated.
Did you perhaps un-check the AMS math box in the master
document? It needs to be checked (in Document>Settings>Math
Options) because the "gather" environment is part of AMS LaTeX,
not standard LaTeX. That's the only thing I can guess without an
example file...
No, that's checked, both in the parent and in the child doc that
was changed (and probably is checked in all docs. I didn't change
anything else since this problem began).
I'll attach the parent file but how can you check the problem
without all the files, and surely you don't want them all?
Sorry, that was my only idea for now. I guess it would be nice to
have a minimal example. I.e., while periodically checking if the
compilation succeeds, cut out all the files that are unrelated to
the problem, and cut all the unrelated content from the files that
cause the problem, and then post only those files that are left,
with the compilation error still occurring. By doing that, you may
even be able to isolate the problem yourself.
Jens
