"No implicit conversion of nil into String"

[RyanMcCarl]

ryan@ryanfedora ledger]$ getprices While parsing file "/home/ryan/Dropbox/notes/ledger/./.ledgerrc", line 1: While parsing option '--begin' Error: Invalid char ';' /home/ryan/.gem/ruby/gems/ledger_get_prices-0.0.9/lib/ledger_get_prices.rb:46:in read': no implicit conversion of nil into String (TypeError) from /home/ryan/.gem/ruby/gems/ledger_get_prices-0.0.9/lib/ledger_get_prices.rb:46:in existing_prices' from /home/ryan/.gem/ruby/gems/ledger_get_prices-0.0.9/lib/ledger_get_prices.rb:58:in new_prices' from /home/ryan/.gem/ruby/gems/ledger_get_prices-0.0.9/lib/ledger_get_prices.rb:40:in run!' from /home/ryan/.gem/ruby/gems/ledger_get_prices-0.0.9/bin/getprices:3:in <top (required)>' from /home/ryan/bin/getprices:22:in load' from /home/ryan/bin/getprices:22:in

' [ryan@ryanfedora ledger]$ `