error while trying to push database to heroku

I am trying to do a

$heroku db:push

this is the error I get

C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/utils.rb:138:in `union': can't convert Array into
String (TypeError)
        from C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/utils.rb:138
        from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
        from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from C:/Ruby/lib/ruby/gems/1.8/gems/taps-0.3.9/lib/taps/multipart.rb:2
        from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
        from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from C:/Ruby/lib/ruby/gems/1.8/gems/taps-0.3.9/lib/taps/data_stream.rb:2
        from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
         ... 8 levels...
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-1.9.11/lib/heroku/command.rb:20:in `run'
        from C:/Ru开发者_运维百科by/lib/ruby/gems/1.8/gems/heroku-1.9.11/bin/heroku:13
        from C:/Ruby/bin/heroku:19:in `load'
        from C:/Ruby/bin/heroku:19

It is a brand new MySQL development database, the taps gem is installed. I have pushed this same database to multiple other heroku apps, those have all been deleted.

---

Have you checked the version of rack gem?

try making it rack (1.0.1)

i.e gem uninstall rack <version number>
then gem install rack 1.0.1

Hope this helps,

Regards,

Saurabh