Changed error message to be more comprehensible to outside users!
Changed error message to be more comprehensible to outside users!

andrewyatz/public-plugins,Ensembl/public-plugins,muffato/public-plugins,muffato/public-plugins,andrewyatz/public-plugins,Ensembl/public-plugins,muffato/public-plugins,Ensembl/public-plugins,andrewyatz/public-plugins,andrewyatz/public-plugins,andrewyatz/public-plugins,muffato/public-plugins