1. LaTeX can't find some files
Check you environment variable set up, or make sure the right files are in the directory with your document (see section Installation).
2. nat2jour.pl produces strange results
Look at the diagnostic output from LaTeX or the log files.
Make sure the bst file it
is including is coming from the correct directory (other packages
such as astrobib also have a file called apj.bst, and this
may be lurking somewhere on your system; make sure it doesn't get
found first). The items in your input bbl file should conform
exactly to extended natbib style (see section Generating a Copy for Electronic Submission).
3. Some references or citations look wrong
This maybe a bug, but I have tested the common ones listed on the
journal web-pages so you might
be doing something exotic. Anyway, when was the last time someone
submitted a paper with a perfect bibliography? :) Check your
bib file for spurious entries. Also check the instructions
for authors
(ApJ or
MNRAS) to see that it really
is wrong. Then you can send a bug report to
jbaker@draco.berkeley.edu; include the entry from the
bib file and the result in the bbl file (and tex
file, for a citation problem). You can do the formatting by hand
by using a @Misc entry. Note that lettering will not work
if some the last names in the bib file are not punctuated
consistently (e.g., some have extra braces as in ADS style and
others don't).
4. BibTeX gives warnings about entries
It can be somewhat persnickety about what fields are allowed for a certain type of entry. Make sure you're not using spurious ones.
5. Abbreviations used for a reference (like JEB98) aren't added to the \bibitem's
No, they're not. :) You can usually get the effect by using a "note"
field in your bib entry.
6. LaTeX crashes with mn.sty
There are two lines which cause trouble; use mn-nat.sty
(in the mn subdirectory) instead (see section MNRAS style).
Go to the first, previous, next, last section, table of contents.