Hello , I was trying to write a custom function which would run on puppet master take input a ini file , parse a section of that ini file and assign its value to a variable . Something like $test = iniread('example.ini', 'Program', 'path') This would assign the value to test variable when the functions runs on the puppet master. iniread.rb file looks like require 'rubygems' require 'inifile' module Puppet::Parser::Functions newfunction(:iniread, :type => :rvalue) do |args| raise(Puppet::ParseError, 'inifile read(): Wrong number of arguments ' + "given (#{args.size} for 3)") if args.size != 3 filename = args[0] section = args[1] key = args[2] file = IniFile.load(filename) data = file[section] value = data[key] return value end end It gives an error while running Error 400 on SERVER: undefined method `[]' for nil:NilClass at /etc/puppetlabs/puppet/modules/example/manifests/init.pp:45 init.pp has $test =iniread("example.ini", "Program", "path") Doing that in ruby works require 'inifile' filename = ARGV[0] section = ARGV[1] key = ARGV[2] file = IniFile.load(filename) data = file[section] InstPath = data[key] puts InstPath Help to this would be really appreciated. Regards, Ritesh -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-users+unsubscribe@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-users/460bb860-e8cb-4022-a1a3-47fb4b0015e5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.