Hi I'm debugging a simple algo for a first exercises in Pharo future book and I get stepToSendOrReturn DNU when using the debugger. :(((((((((((((((((((((((((((((((((((( You see I would really like in Pharo that we get new tools only when there are better than the old ones. I still could not see how GTDebugger helps me debugging faster my programs. Personally the fact that GT debugger can show bytecodes or can be extended is not in the critical path. My critical path is that I can debug Pharo programs and now I cannot. I also did not see any comments on the multiple complaints about the funky place for the buttons. So to me GTDebugger is a disappointement. Here is the kind of code I'm debugging so this is not that complex nor implying concurrency or whatever complex. coinsFor: aValue into2: accuWallet | accu | self halt. [ accu := accuWallet money. accu < aValue ] whileTrue: [ | big | big := self biggest. [ big > (aValue - accu) ] whileTrue: [ big := self biggestBelow: big ]. self removeCoin: big. accuWallet addCoin: big ]. ^ accuWallet Stef