Reinstall error

[bjm88]

Benjamins-MacBook-Pro:T Ben$ brew cask install pdftk
Error: Cask for pdftk (!) is already installed. Add the "--force" option to force re-install.
Benjamins-MacBook-Pro:T Ben$ brew cask install pdftk --force
Error: undefined method using' for nil:NilClass Please report this bug: https://github.com/caskroom/homebrew-cask/issues /usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/download.rb:11:inperform'
/usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/installer.rb:58:in download' /usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/installer.rb:35:ininstall'
/usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/cli/install.rb:20:in block in install_casks' /usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/cli/install.rb:17:ineach'
/usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/cli/install.rb:17:in install_casks' /usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/cli/install.rb:6:inrun'
/usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/cli.rb:80:in run_command' /usr/local/Cellar/brew-cask/0.37.1/rubylib/cask/cli.rb:120:inprocess'
/usr/local/bin/brew-cask.rb:42:in <top (required)>' /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:inrequire'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in require' /usr/local/Library/brew.rb:58:inrequire?'
/usr/local/Library/brew.rb:146:in `

'

[vitorgalvao]

You’re using an old version of homebrew-cask. Please brew update && brew upgrade brew-cask && brew cleanup && brew cask cleanup and try again.

Please always do this before opening new issues.

See also #10224.

[vitorgalvao]

pdftk also was removed due to issues. Please always do a search before opening issues.