From: ashbb Date: 2012-01-14T10:01:38+09:00 Subject: Re: Green Shoes v1.0 released --0016e6d58f39e7adb604b6728570 Content-Type: text/plain; charset=ISO-8859-1 Hi Barry, > why do I get this error? > > C:\Users\aaa\Ruby193>gem install green_shoes > ERROR: Error installing green_shoes: > invalid gem format for > C:/Users/aaa/Ruby193/lib/ruby/gems/1.9.1/cache/g > lib2-1.1.0-x86-mingw32.gem Umm,.. I don't know why... I googled with the term 'invalid gem format'. Many people are saying that why not remove the gems and reinstall them again. ashbb --0016e6d58f39e7adb604b6728570--