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When editing medium sized .tex files, I often find it convenient to make use of the narrow command C-x n n (narrow-to-region), usually in combination with the mark section command C-c * (LaTeX-mark-section).

I then wish to compile only the accessible portion. For this purpose, I have been using the Tex command C-c C-b (TeX-command-buffer), but recently this command has started acting inconsistently. Depending on the position of point, it sometimes

  1. Compiles only the accessible portion
  2. Compiles the entire buffer
  3. Returns the message ad-Advice-TeX-region-create: End of buffer

Compiling the accessible portion is what I intend, and I can usually (but not always) trigger this behaviour by putting point at the beginning of a line or at the end of the accessible portion.

Compilation of the entire buffer seems to happen sometimes when I have previously compiled the entire buffer with C-c C-c (TeX-command-master), but this is not consistent at all.

The End of buffer error is usually triggered by not placing point at the beginning of a line. It also seems to happen more frequently if there is a reference in the accessible portion to something in the inaccessible portion.

Sometimes (usually if I first trigger the End of buffer error by running C-c C-b with point placed mid-line, and then run C-c C-b with point placed at the beginning of a line) it happens that, although compilation occurs, new changes are not included in the output _region_.pdf file, although they are included in the _region_.tex file.

As a side-note, which is perhaps related, the Tex command C-c C-z (LaTeX-command-section) also behaves differently if I narrow: Instead of compiling the current section inside the accessible portion, it compiles only from the beginning of the section until the position of point.

I guess first narrowing and then running C-c C-b is not the intended use of the command C-c C-b. In that case, I should instead make my own command for this specific purpose. But it used to work for me consistently with the intended effect, so I am interested in knowing what might be the cause of this inconsistent behaviour.

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