I'm entirely new to LaTex. Have very little idea about things. So our university gave us a sample of report and I'm modifying the content. Whenever I try to do bibliography & citation, it gives me very strange following error:

Runaway argument?

{ \end {thebibliography}

! File ended while scanning use of \BRorg@thebibliography.


l.230 \bibliography{reference}

Whenver I comment our these lines, it works perfectly fine:


I've following bib file (with sample references):


I'm very tired of searching. Please help and have a look. Thanks in advance!

  • 1
    Welcome to tex.sx. I'm not sure whether it might be responsible for the reported error, but the entry in the bib file for Pan doesn't have an entry type identified. It looks like it is an article. Commented Jan 29, 2020 at 20:17
  • Hi @barbarabeeton! I tried to empty the bib file. But nothing seems to work Commented Jan 29, 2020 at 20:22
  • 3
    Don't show a screenshot, show a small but complete example of your tex file and copy the bib-entries (if they are relevant). Commented Jan 29, 2020 at 21:01
  • I don't understand what you mean by "empty the bib file". barbarabeeton is saying that instead of {Pan,, you need something like @ARTICLE{Pan,.
    – Teepeemm
    Commented Jan 29, 2020 at 21:07
  • You should also delete the old .bbl file -- that's what LaTeX reads that contains the error. It has to be rebuilt after you fix the .bib file. Commented Jan 29, 2020 at 21:12

2 Answers 2


There are two parts to this problem. Both must be attended to simultaneously. Fixing either one separately won't solve the problem.

First, the compile is reading the .bbl file, so that will need to be removed and rebuilt. But before removing it, it's worth looking at it to see if you can spot a place where the code looks flaky. (The .bbl file wasn't shown in the question, so can't be specific.)

Next, look at the .bib file. The obvious things to look for are incomplete entries -- missing closing braces or commas are the usual culprits, but that's not the case here. However, there's something else that appears to be incomplete: After the entry beginning @BOOK{MG, there is an incomplete entry beginning {Pan, with no entry type. I can't say for sure that this is what has caused the problem, but it does need to be fixed. It looks like an entry from a journal, so change it to


Then, after making sure the old .bbl file has been removed, reprocess, recreating the .bbl file from the updated .bib file. Check to make sure there were no errors in the Bibtex run; that will create a .blg file as a record, and it's worthwhile to become familiar with that, since errors in the Bibtex run will usually have repercussions in the LaTeX run, even if only to omit a reference (which will not stop the processing, but will leave an unresolved \cite),

After compiling again with LaTeX, if the change to the .bib file was correct, the job will finish, and the output will be what you expect.


{ \end {thebibliography} This if written as \end {thebibliography} then it may run. Please check that curly brackets should be in pairs.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .