Hi, At Wed, 11 Oct 2000 08:15:06 +0900, Robert Feldt <feldt / ce.chalmers.se> wrote: > /usr/local/lib/ruby/site_ruby/1.6/feldt/ai/ml/Predictions.rb:40: [BUG] > rb_gc_mark(): unknown data type 0x18(0x6107c128) non object "[BUG]" means that it is the bug of ruby or extension libraries. It may be the problem with garbage collection. Can you see me the whole code which cause this error? Shugo