> I don't know how to prevent such cases. The same can happen to you if you
> update your LaTeX packages and a package (or class) introduces a new macro.
Yes, such cases cannot be prevented.
As stated in our documentation, the user is responsible for what he is doing in the document
preamble. You find in all LaTeX books a note that it is important to use a well-determinable name
for new commands to avoid package clashes.
You will get the same error when you install a new LaTeX-package that also
defines \ce.
> Did I mention recently that we need a package manager?
What will it do?
regards Uwe
