Hi Mariano,

if you take the download Image from the Pharo website, then load commandShell and then zinc from the catalog browser and then do

Delay delaySchedulerClass: DelayMillisecondScheduler.

and then

20 timesRepeat: [OSProcess ��command: ('echo "Hi there"').]��

Then you will get the lock.

Does this help to find the reason for the problem?

Regards

Sabine