# [OS X TeX] strange behavior

Themis Matsoukas tmatsoukas at icloud.com
Wed Sep 7 07:13:30 EDT 2016

> On Sep 6, 2016, at 4:18 PM, Nitecki, Zbigniew H. <Zbigniew.Nitecki at tufts.edu> wrote:
>
> What should I look for in the following situation?
>
> I have a large book project, essentially finished, recently I tweaked one figure and went to typeset the ms. for the final version.
>
> I got an error message: undefined control sequence.  The macro in question, called \bookans, inserts a list of exercises whose answers are given in the back of the book.  It is defined in a style file called formatmacros.sty, which was initially called by another style file, calculusmacros.sty, in the form
>> \RequirePackage[sectiontheorem,indexdefs]{format macros}
> (along with a few other style files).
> The macro has been used successfully in the same project in the past, but I decided maybe the call was buried too deeply so I Commented out \usepackage{calculusmacros} and wrote in all the calls, using \usepackage instead of \RequirePackage, into the preamble to the master source file.  In any case, the error message continues. I am getting a similar message for two other macros, one defined in the same style file, the other in a different file, also initially called by calculusmacros.sty.  All of these macros never gave me trouble before this particular run.
>

If you have a copy of the book before tweaking that last figure, I’d go there and start again. Otherwise, I would start typesetting one chapter at a time until I hit the problem. Some times just one missing bracket can cause all sorts of unrelated error messages during compilation.

Themis