# [EXT] Re: How to test pdflatex-dev

Philip Taylor P.Taylor at Rhul.Ac.Uk
Mon Mar 8 17:43:34 CET 2021

Phelype Oleinik wrote:

You just have to run on the command line:

pdflatex-dev

As readers of this list will know, I don't "speak" LaTeX, but was intrigued by the above and so sought to try it out.  I typed :

pdflatex-dev

as instructed (this to TeX Live 2021 pre-test), then entered (in response to the "**" prompt) :

\end {document}

at which point I was surprised.  PdfLaTeX-Dev reported :

entering extended mode
LaTeX2e <2021-05-01> pre-release-2 (develop 2021-3-6 branch)
L3 programming layer <2021-02-18>
! I can't find file texput.aux'.
\enddocument ...keatletter \@@input \jobname .aux
\fi \UseOneTimeHook {enddo...
<*> \end {document}

(Press Enter to retry, or Control-Z to exit)

Since it must have "known" that it had not created texput.aux', and with no reason to think that such a file might exist from a previous run, why did PdfLaTeX-Dev try to \@@input it ?
--
Philip Taylor

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