[BioRuby] marshal data too short

[Michal]

Hi,
I installed on Ubuntu 10.10 (Linux Mint) Ruby 1.9.2 in the following way

$ tar xvfz ruby-1.9.2-p136.tar.gz
$ cd ruby-1.9.2-p136/
$ ./configure --prefix=/home/mictadlo/apps/ruby
$ make
$ make install
$ vim ~/.bashrc
  export APPS=/home/mictadlo/apps
  export RUBY_HOME=$APPS/ruby
  export LD_LIBRARY_PATH=/RUBY_HOME/lib
  PATH=$RUBY_HOME/bin:$PATH
$ . ~/.bashrc
$ ruby -v
  ruby 1.9.2p136 (2010-12-25 revision 30365) [i686-linux]

$ tar xvfz bioruby-1.4.1.tar.gz
$ cd bioruby-1.4.1/
$ ruby setup.rb
$ bioruby
     Loading config (/home/mitlox/.bioruby/shell/session/config) ... done
     Loading object (/home/mitlox/.bioruby/shell/session/object) ... 
Error: Failed to load (/home/mitlox/.bioruby/shell/session/object) : 
marshal data too short
     done

     . . . B i o R u b y   i n   t h e   s h e l l . . .

       Version : BioRuby 1.4.1 / Ruby 1.9.2

     bioruby> exit

How can I fix the error in BioRuby?

Thank you in advance.

Michal