The code is here




I try to reproduce the problem,and check whether missing bracket.But the error is still there.

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    Please complete your code to a minimal document (in the sense of a minimal working example) allowing us to reproduce the problem. – Gonzalo Medina Oct 12 '12 at 3:59
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    Your code works OK in my system. Does this exact code triggers the error mentioned? – Gonzalo Medina Oct 12 '12 at 4:48
  • @GonzaloMedina I second that. – azetina Oct 12 '12 at 4:51
  • Please add the .log file obtained after processing the code you just posted. If the file is too long, you can upload it elsewhere (pastebin, for example) and provide a link here. – Gonzalo Medina Oct 12 '12 at 4:54
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    @baker perhaps there was a corrupted .aux file from a previous run causing the problem. – Gonzalo Medina Oct 12 '12 at 5:38

The error message you mention is triggered by a missing closing brace in \dfrac (or one of its variants), as the following simple example illustrates:




Processing the above document yields

Runaway argument?
{b$ \end {document} 
! File ended while scanning use of \@genfrac.
<inserted text> 
<*> a.tex

The solution is to add the missing brace:



| improve this answer | |
  • the error detector says it is in the line 0. And I put all content to comment, the error is still there – baker Oct 12 '12 at 4:24
  • @baker Then, please (as I suggested in my comment to your question) add a complete document allowing us to reproduce the problem; if you say that commenting out all the contents still triggers the error, such a complete document can be easily built. – Gonzalo Medina Oct 12 '12 at 4:26
  • I tried to reproduce the problem ,and check the bracket already, but it seems that error does not be solved. Code is showed above. Thanks for your help. – baker Oct 12 '12 at 4:51

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