From: Luis Lavena Date: 2010-09-08T03:05:11+09:00 Subject: Re: Installing ActiveRecord gem On Sep 7, 12:15 pm, Abder-Rahman Ali wrote: > I ran the command again and got the following: > > C:\Users\Abder-Rahman\Desktop\Research\dicom>gem install activerecord > Successfully installed tzinfo-0.3.23 > Successfully installed activerecord-3.0.0 > 2 gems installed > Installing ri documentation for tzinfo-0.3.23... > Installing ri documentation for activerecord-3.0.0... > ERROR:  While executing gem ... (Errno::EINVAL) >     Invalid argument - ./