Following MWE compiles:
\documentclass{beamer}
%\usepackage[all]{xy}
\usepackage{circuitikz}
\begin{document}
\end{document}
Following MWE also compiles:
\documentclass{beamer}
\usepackage[all]{xy}
%\usepackage{circuitikz}
\begin{document}
\end{document}
But following doesn't compile:
\documentclass{beamer}
\usepackage[all]{xy}
\usepackage{circuitikz}
\begin{document}
\end{document}
and gives this error message.
etex. Without guys like you I would really turn into a LaTeX hater. – kamalbanga Apr 30 '14 at 10:51