TypeError - can't convert Hash into String:

TypeError - can't convert Hash into String:
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast/formatter.rb:44:in `system'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast/formatter.rb:44:in `run'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast/formatter.rb:20:in `initialize'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast/report.rb:36:in `run'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast/report.rb:36:in `generate'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast/report.rb:21:in `initialize'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast.rb:96:in `new'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/blast.rb:96:in `run'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/routes.rb:125:in `POST /'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1609:in `call'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1609:in `compile!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:974:in `[]'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:974:in `route!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:993:in `route_eval'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:974:in `route!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1014:in `process_route'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1012:in `catch'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1012:in `process_route'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:972:in `route!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:971:in `each'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:971:in `route!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1084:in `dispatch!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1066:in `invoke'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1066:in `catch'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1066:in `invoke'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1081:in `dispatch!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:906:in `call!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1066:in `invoke'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1066:in `catch'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1066:in `invoke'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:906:in `call!'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:894:in `call'
/usr/lib/ruby/gems/1.8/gems/rack-1.6.4/lib/rack/head.rb:13:in `call'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:181:in `call'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:2021:in `call'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1486:in `call'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1795:in `synchronize'
/usr/lib/ruby/gems/1.8/gems/sinatra-1.4.6/lib/sinatra/base.rb:1486:in `call'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver.rb:90:in `call'
/usr/lib/ruby/gems/1.8/gems/rack-1.6.4/lib/rack/handler/webrick.rb:88:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/server.rb:26:in `start'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver/server.rb:9:in `run'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/lib/sequenceserver.rb:55:in `run'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/bin/sequenceserver:417
/usr/lib/ruby/gems/1.8/gems/slop-3.6.0/lib/slop.rb:260:in `call'
/usr/lib/ruby/gems/1.8/gems/slop-3.6.0/lib/slop.rb:260:in `parse!'
/usr/lib/ruby/gems/1.8/gems/slop-3.6.0/lib/slop.rb:65:in `parse!'
/usr/lib/ruby/gems/1.8/gems/sequenceserver-1.0.4/bin/sequenceserver:24
/usr/bin/sequenceserver:19:in `load'
/usr/bin/sequenceserver:19

Updating your Ruby to 1.9.2 or above should fix this.

– Priyam