Hi @mariano: "Did you test if the one-liner (Delay delaySchedulerClass: DelayMillisecondScheduler.) fixes these lookups? "
-> my config loads materialDesignLite (which loads seaside and magritte). after loading this and trying the one liner, my image does not respond anymore. you can reproduce it when taking a new image and loading material design lite (no catalog entry yet) Gofer new url: 'http://smalltalkhub.com/mc/KevinLanvin/MaterialDesignLite/main' ; package: 'ConfigurationOfMaterialDesignLite'; load. ((Smalltalk at: #ConfigurationOfMaterialDesignLite) project version: #development) load. (proceed at the deprecated warnings for subString:) then try the one liner. Image does not respond anymore. @Paul, I took a new image, I loaded OSProcess from catalog browser and did the change. | aio | (aio := Smalltalk at: #AioEventHandler) ifNotNil: [ aio startUp: resuming ]. OSProcessAccessor initialize. "resuming ifTrue: [" self initializeThisOSProcess "]" (problem persists with and without code in ") 20 timesRepeat: [OSProcess command: ('echo "Hi there"').] No - the problem persists. I will stay at pharo4 for several weeks and the try again. If I can help fixing the problem I will do - please tell me what to do. Regards Sabine