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I was updating my tutor handouts for calculus and suddenly the whole thing refuses to compile. I have no idea what is wrong or why it is saying this. All I changed were some equations and I added a 

\begin{aling}
text
\end{align}

This is line 62:

\let\originaleqref\eqref

I use it for refs, and it always worked until now.

\let\originaleqref\eqref \renewcommand{\eqref}{Eq.~\originaleqref}
\newcommand{\tref}[1]{Table (\ref{#1})} 
\newcommand{\fref}[1]{Fig.
(\ref{#1})}

Please help me get this to work! I need to hand this out tomorrow.=/

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3  
Welcome to TeX.sx! Please add a minimal (non-)working example (MWE) that illustrates your problem. It is considered a lot better to put in some code that will compile, as it makes it a lot easier for us to copy it into our text editor and work with it, and see exactly what it is you are trying to do. – tohecz Nov 15 '12 at 19:52
4  
I edited to mark your code, but did not change the aling to not change the meaning of the post. Is this a copy typo, or the same in your code? That would cause an error. – Stefan Kottwitz♦ Nov 15 '12 at 19:57
Here is my code: pastebin.com/FXS1DcbG Clearing the temp files seems to help, but it starts talking about some missing $'s then, and I have no idea where that could be =/ – Coolcrab Nov 15 '12 at 20:16
2  
@Coolcrab: This is a lot of code. In order to help people who'll help you, could you please remove everything from the code that's not related to your problem and add a little document, a so-called minimal working example (MWE), that people can copy and compile to reproduce your problem? Otherwise, your question might be in danger of being closed as too localized. Please add that MWE to your question by clicking edit. – doncherry Nov 15 '12 at 20:24

closed as too localized by doncherry, Martin Schröder, Kurt, Stephen, Joseph Wright♦ Nov 16 '12 at 20:02

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ.

1 Answer

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Change line 493 of your code to: 

\item Find d/dx $\rpar{ y \sin(x) = x^3 + \cos(y)}$   %493

and on my system (MiKTeX 2.9) it is compiling without errors with pdflatex.

I have corrected your $ for start and end the math mode in that line.

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