undefined method `cache' for Gem:Module When create JIVE app

[bao1018]

Hi, I am new guy to Jive, I got below error when I try to create the app. My ruby version is 1.9.3

zhou02832:jive fzhou02832:jive rliu093$ ruby -v
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin11.4.2]

fzhou02832:jive rliu093$ $ jiveapps create pwcsdc_jive
/Users/rliu093/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:45:in require': iconv will be deprecated in the future, use String#encode instead. /Users/rliu093/.rvm/gems/ruby-1.9.3-p392/gems/systemu-2.2.0/lib/systemu.rb:29: Use RbConfig instead of obsolete and deprecated Config. === Creating new Jive App "pwcsdc_jive"... Step 1 of 4. Checking availability and creating remote repository... shenSUCCESS Step 2 of 4. Generating app scaffolding... undefined methodcache' for Gem:Module
fzhou02832:jive rliu093$ jiveapps create pwcsdc_jive
/Users/rliu093/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:45:in `require': iconv will be deprecated in the future, use String#encode instead.
/Users/rliu093/.rvm/gems/ruby-1.9.3-p392/gems/systemu-2.2.0/lib/systemu.rb:29: Use RbConfig instead of obsolete and deprecated Config.