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Here is the tex file which I encounter to this error, the result has no problem but the software show this error and I can't understand what is wrong (as the pdf result is ok!). So I will be glad if somone say me what is wrong or if there is nothing wrong say me how I can make the software to don't show it again.

\documentclass[10pt,a4paper]{book}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage[all]{xy}
\begin{document}
\xymatrix{
     & X\ar[r]^f\ar@{}[dr]|(0.35){\big\circlearrowleft} & Y\\
     \exists Z\subseteq X\;s.t. & Bl_Z(X)\ar[u]^{\pi}\ar@{.>}[ur]_{\exists f'} &
     }
\end{document}
ShreevatsaR
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1 Answers1

3

You used a \big command without adding a delimiter behind. Not sure what that was for, I suppose you were trying to get a larger \circlearrowleft? In that case, since you have loaded graphicx package already, you can try something like \scalebox{2}{\(\circlearrowleft\)}.

Francis
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