I am very new to Latex and I am getting this error:
Class scrartcl Error: undefined old font command `\bf'.
See the scrartcl class documentation for explanation.
Type H <return> for immediate help.... \maketitle
My template is never even using \bf but I still get this error. I am using the newest version of Texmaker.
The error message is showing that you have a local redefinition of (some command used in) the definition of \maketitle that uses \bf.
\bf has not been defined by default since 1993 so the code you are using seems a little old.
Rather than debugging that, simpler would be to use the definition of \bf as used for example by article class
\DeclareOldFontCommand{\bf}{\normalfont\bfseries}{\mathbf}
will define \bf to work as it worked in LaTeX2.09.
\bf(it should use\bfseriesbut if you give no information it is hard to know what to change) or add\DeclareOldFontCommand{\bf}{\normalfont\bfseries}{\mathbf}to your preamble to define\bf– David Carlisle Jan 3 '17 at 13:35texmakerwhich is just the editor used for producing the tex source file. – David Carlisle Jan 3 '17 at 13:36\bfcommand. Can you edit into the question your preamble (from\documentclassto\begin{document}). – Joseph Wright♦ Jan 3 '17 at 13:43\bfis in a definition of\maketitlein some file that you are using. – David Carlisle Jan 3 '17 at 13:43