<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi Gerald, Juan, Your fix did not work. The mouseStillDown method is still called immediately <div class="moz-cite-prefix">Le 21/08/2021 à 19:44, Juan Vuletich a écrit : </div> <blockquote type="cite" cite="mid:61213B82.3030509@jvuletich.org">This is of course true!!! Hilaire, if you are sending any message that alters Morphic state from a different process, follow Phil's advice. It might make things more complicated, as possibly your process would need to wait until that block is effectively run, possibly using a Semaphore.</blockquote> I am not altering Morph state from a different process. I case it helps, I was using the same way of doing in Pharo. Hilaire </body> </html>