I have following strange problem. When I try to install any of the L3 packages (like l3packages, l3build, etc.) within the package manager I get:
The operation could not be completed because the following file failed verification:
C:\Miktex Package Repository\l3packages.tar.lzma
I think the files are not corrupted because I tried installing it on another computer and it worked. I also tried using different repositories. Latex output is just:
Fehler: running 'texi2dvi' on 'FILE.tex' failed LaTeX errors: ! LaTeX Error: File `xparse.sty' not found.
Does anybody know what's going on here? All other packages can be installed as far as I can tell. However, for other packages I also get a weird message, even though they are successfully installed.
The operation failed for some reason.
C:\Program Files (x86)\MiKTeX 2.9\miktex\bin\initexmf.exe
I have no idea why this happening, I would be grateful for some insight.
Best Answer
I had the same problem and looked into the log. It said that this command had failed:
I opened a command prompt in administrator mode and executed it and now pdflatex is working for me. I first tried to execute that in a non-administrator window and it failed because of permissions. So I am pretty sure this is the right solution.