# Bug in Ruby 1.9.1 or me? ERROR: While executing gem ... (TypeError) can't convert Pathname into Str **URL:** \ **Category:** Ruby\ **Created:** [March 6, 2009, 1:08am UTC](https://www.ruby-forum.com/t/bug-in-ruby-1-9-1-or-me-error-while-executing-gem-typeerror-cant-convert-pathname-into-str/162129 "2009-03-06T01:08:51Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Todd\_Miller](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/f6c823/32.png) [@Todd\_Miller](https://www.ruby-forum.com/u/Todd_Miller)\ **Post date:** [March 6, 2009, 1:08am UTC](https://www.ruby-forum.com/t/bug-in-ruby-1-9-1-or-me-error-while-executing-gem-typeerror-cant-convert-pathname-into-str/162129/1 "2009-03-06T01:08:51Z")
I installed ruby on Ubuntu 8.1 in the following manner removed all ruby files using locate sudo apt-get install readline5-dev build-essential autoconf wget libreadline5-dev libncurses5-dev zlib1g-dev libsqlite3-dev libssl-devsv libncurses5-dev libssl-dev checkinstall mkdir -p /usr/local/src && cd /usr/local/src wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-p0.tar.bz2 tar -xjvf ruby-1.9.1-p0.tar.bz2 cd ruby-1.9.1-p0 .sudo ./configure --prefix=/usr --enable-pthread --enable-shared #perhaps i should have added -with-readline-dir=/usr/local sudo make # sudo checkinstall found everything to be OK IINSTALLING GEMS sudo gem sources -a [http://gems.github.com](http://gems.github.com) sudo gem install rack rake # It seems that you need to install rack before installing actionpack and rails requires rake" sudo gem install rails actionpack activesupport activerecord activeresource actionmailer # sudo gem install rails didn’t install activesupport and some other packages Now all of this seems to work fine. However, when I install other gems, I usually receive the following error message sudo gem install sinatra Successfully installed sinatra-0.9.1 1 gem installed Installing ri documentation for sinatra-0.9.1… –inline-source will be removed from RDoc on or after August 2009 Updating ri class cache with 3781 classes… Installing RDoc documentation for sinatra-0.9.1… –inline-source will be removed from RDoc on or after August 2009 ERROR: While executing gem … (TypeError) can’t convert Pathname into String Googling on ‘can’t convert Pathname into String’ doesn’t turn up much. Does anyone have any ideas about this?