The answer to topic question is to use pure Ruby interpreter in
NetBeans, NOT NetBeans' JRuby.

On Sep 11, 3:52 ¨Βν¬ ΝΑχιξιαςσλΌΝΑχιξιας®®®ΐηναιμ®γονχςοτεΊ
> While using gems with NetBeans,
>
> I've created new Rails Project
> then generated Scaffold
> then I want to create database
> using Rake Task db:create :
>
> and gets:
>
> ...
> .../mysql.so:1: Invalid char `\220' ('<square>') in expression.
>
> I've installed mysql ruby gem earlier. And mysql.so comes with this
> gem.
>
> On 10 Wrz, 21:37, "Jano Svitok" <jan.svi... / gmail.com> wrote:
>
>
>
> > On Wed, Sep 10, 2008 at 21:18, MAwiniarski <MAwiniar... / gmail.com> wrote:
> > > On 10 Wrz, 13:26, Lars Christensen <lar... / belunktum.dk> wrote:
> > >> On Sep 10, 1:00 pm, MAwiniarski <MAwiniar... / gmail.com> wrote:
>
> > >> > Using Ruby in NetBeans I've got following error in separate cases with
> > >> > gems:
>
> > >> > <path>/<file>.so:1: Invalid char `\220' in expression.
>
> > >> > What is it about ?
>
> > >> By coincience, I stumbled over the exact same error message yesterday
> > >> while making a wrapper for some ruby scripts. It turned out I had
> > >> accidentally called ruby.exe with the ruby.exe executable as argument,
> > >> for example (simplified):
>
> > >> system("ruby c:\\ruby\\bin\\ruby.exe")
>
> > >> '\220' is 0x90 HEX and the third byte (after two ASCII chars) in a
> > >> Windows executable or DLL. Ruby doesn't like that when attempting to
> > >> parse an executable.
>
> > >> Hope it helps,
> > >> Lars
>
> > > Maybe *.so files needs to be saved in a different encoding (ASCII,
> > > UTF, ...) ?
>
> > .so is usually renamed dll file (on windows) or the library itself (on
> > linux), so no encoding change needed.
> > What are you doing when you get this error?