From: Joel Pearson Date: 2013-06-22T01:29:55+09:00 Subject: Re: A question about assignment of multidimensional array error message Check that msgCount[r] exists before this line: msgCount[r][c] = mtc* The approach you're using with indices isn't particularly Rubyish. I'd use "each", and add to the array with "<<" -- Posted via http://www.ruby-forum.com/.