> I look forward to the next bug report :) Here are some more files that don't need the benchmark suite to run. I also ran all of the tests with Gambit and there wasn't any errors. Testing maze under Guile-r5rs Compiling... Running... ERROR: In procedure zero?: ERROR: Wrong type argument in position 1: #f Testing trav2 under Guile-r5rs Compiling... Running... ERROR: In procedure memoization: ERROR: Non-list result for unquote-splicing (#(node () () 1 #f #f #f #f #f #f ...) . #0#) in expression ((unquote-splicing (#> (#> #@0+1)))). Testing trav1 under Guile-r5rs Compiling... Running... ERROR: In procedure memoization: ERROR: Non-list result for unquote-splicing (#(node () () 1 #f #f #f #f #f #f ...) . #0#) in expression ((unquote-splicing (#> (#> #@0+1)))). Best Regards, Juhani