> >   require 'mysql'
> > 
> > raises the following error message:
> > 
> > 
> /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so: 
> Permission
> > denied - 
> /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so
> > (LoadError)
> >         from
> > 
> /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in `require'
> > 
> > The access rights to mysql.so are as follows:
> > 
> > 
> > -rw-r--r-- 1 rfischer mkgroup-l-d 81984 May 21 18:08
> > /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so
> > 
> > 
> > Using the mysql module with Ruby on Windows outside Cygwin 
> works well.
> > What could be the reason for this problem?
> 
> The first problem are the access rights.  Shared libs must have the
> execute bits set.  chmod +x mysql.so will help.

This helped a lot! 

> 
> The second problem is that this shared lib has been created for the
> native win32 version of ruby, not for the Cygwin version.  It *might*
> work together, but it's neither guaranteed, nor supported.

... which might explain the new behaviour, that the programs starts to
run, but at the end gets a

  ~/thome/importer_tests $ onereq_oneappl.rb
  /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so: [BUG]
Segmentation fault
  ruby 1.8.6 (2007-03-13) [i386-cygwin]

I see that I am here still on experimental ground. Maybe the idea of
using mysql from within
Cygwin-Ruby was really not so good in the first place....

Ronald
-- 
Ronald Fischer <ronald.fischer / venyon.com>
Phone: +49-89-452133-162