Why does Lualatex crash after a recent update?

After updating packages of MiKTEX 2.9 lualatex stopped working.

I execute this code:

\documentclass[12pt]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node[] at (0,0) {A};
\end{tikzpicture}
\end{document}


and I get this error:

"Process started: lualatex.exe -synctex=1 -interaction=nonstopmode "test".tex Error: Command crashed: lualatex.exe -synctex=1
-interaction=nonstopmode "test".tex Process exited with error(s)"


Why does the command crash? What should be done to continue my work?

PDFLatex and XeLatex work fine, but I need lualatex, cause my thesis is with lualatex.

According to Ulrike Fischer comment (see above) "Open Miktex settings, go to the tab Formats, select lualatex and click on Build" First do it in admin mode, then in user mode.

Now everything is working!

• You opened miktex settings (admin). As it worked this is fine. But if a user format exists then one should use the "non-admin" miktex settings to overwrite it. – Ulrike Fischer Mar 25 '15 at 14:37
• Doing that fixed lualatex on my workstation, but I can't seem to be able to fix an install on Windows 2003 server. Logged in as the user which lualatex runs under, built the format, but still the same problem. And pdflatex no longer works there either. This is a catastrophe. – ajeh Mar 26 '15 at 17:54
• @UlrikeFischer After the todays update, the update program itself crashes before fetching the available updates. How are you proposing to install further updates? – ajeh Mar 26 '15 at 18:18
• @ajeh: You can always get packages from CTAN and move them to a local repository and install from there (if mpm is still working). But I would at first try to run the manager from the command line. Btw: That pdflatex isn't working could mean that you have quite a different problem. – Ulrike Fischer Mar 26 '15 at 18:23
• @UlrikeFischer After running settings repeatedly under the service user and logging on and off, I finally got pdflatex working. But lualatex works only under my own account (which is a domain admin) and not under the service account. What could that be? Do I need to blow away some files from the service account's home directory? – ajeh Mar 26 '15 at 18:35

The following steps worked for me after building format files was not sufficient (pdflatex kept throwing errors re dump file not found and lualatex just quit silently):

1. Uninstall MikTex.
2. Blow away all instances of MikTex folders under all of the user's folders.
In my special scenario there were additional steps required due to running lualatex from an ASP.NET web page under a service account using impersonation, but the first 3 at least allowed the regular users to compile.