Installation /Configuration Problem with tetex

[Matthias Faulstich <faulstich@elon07.fh-swf.de>]

Hello!

Could you please give me a hint regarding an installation problem?

I am running tetex on debian-sid since a log time. 
Last time, I wanted to use LaTeX, the installed version was
3.0-9.xx
On a tex file I have translated with latex a year before without problems, I 
got an error message, that 
latex.fmt
has the wrong format.
After googeling for that error, I renamed it and tried to create a new file 
with dpkg-reconfigure, which failed.
Then I tried to make a complete re-installation and removed the complete latex 
stuff first. 
Actually, I have this packages installed:
ii  tetex-base 3.0-10    Basic library files of teTeX
ii  tetex-bin    3.0-10.1 The teTeX binary files
ii  tetex-doc   3.0-10    The documentation component of the Debian teTeX 
packages
ii  tetex-extra  3.0-10    Additional library files of teTeX

But now, I get the message

latex filename.tex
This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4)
kpathsea: Running mktexfmt latex.fmt
fmtutil: format `latex' not available.
I can't find the format file `latex.fmt'!

Can you give me any hint how to recreate the latex.fmt file?

Thanks and regards
Matthias