deivid-rodriguez/byebug · error · Byebug::CommandNotFound

Unknown command '#{name}'. Try '#{help}'

Error message

Unknown command '#{name}'. Try '#{help}'

What it means

Error "Unknown command '#{name}'. Try '#{help}'" thrown in deivid-rodriguez/byebug.

Source

Thrown at lib/byebug/commands/help.rb:49

      "Helps you using byebug"
    end

    def execute
      return help_for_all unless @match[1]

      return help_for(@match[1], command) unless @match[2]

      help_for(@match[2], subcommand)
    end

    private

    def help_for_all
      puts(processor.command_list.to_s) # rubocop:disable Lint/RedundantStringCoercion
    end

    def help_for(input, cmd)
      raise CommandNotFound.new(input, command) unless cmd

      puts(cmd.help)
    end

    def command
      @command ||= processor.command_list.match(@match[1])
    end

    def subcommand
      return unless command

      @subcommand ||= command.subcommand_list.match(@match[2])
    end
  end
end

View on GitHub (pinned to 25476b18d9)

Solutions

1. Check the command or subcommand name for typos and run 'help' to list available commands.
2. Run 'help <cmd>' without a subcommand to see the valid subcommands of <cmd>.

Example fix

(byebug) help break   # use the exact command name instead of an unknown one

When it happens

Trigger: Thrown at lib/byebug/commands/help.rb:49 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deivid-rodriguez/byebug@25476b18d9 (2026-08-23). Data as JSON: /api/errors/925f1bb68e297248. Report an issue: GitHub.