Hi Aliaksei, thank you for your reply. I dowloade Bloc from the source you gave me and realized the memory tutorial is the same one wich was shown at the PharoDays2017. I watched this video yesterday and tried to follow along but it did not quite work. That was the reason why I found this strange old paper.
I did it now again but following the PDF file. I get the same kind of problem. The code seems to be right but when I run a new Card object wich should be grey sqaure by this point the Inspector shows nothing. Resetting the Bloc universe did not help either. <http://forum.world.st/file/t371759/Memory.png> It looks like its would be empty. Do you have any idea how I can fix this? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html