Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\kitagawa>latex test.tex
warning: kpathsea: configuration file texmf.cnf not found in these directories:
c:/ptex/texmf/web2c.
This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011/W32TeX)

kpathsea: Running mktexfmt latex.fmt

The command name is c:\ptex\bin\mktexfmt
Running the command c:\ptex\bin\fmtutil.exe
warning: kpathsea: configuration file texmf.cnf not found in these directories:
c:/ptex/texmf/web2c.
Failed to find cnffile fmtutil.cnf.
warning: kpathsea: configuration file texmf.cnf not found in these directories:
c:/ptex/texmf/web2c.
I can't find the format file `latex.fmt'!