Hello. I have standalone application with UI which hangs sometime (very *rarely*). This application has many threads which interacts with server. All interactions with server and UI activity logged. But at hang state there are no new log entries. There are no server interactions. It looks like all VM block image stuff. ("alt ." not work too). Logs always finished at same position. I know where I should add extra logging which give me information before hang. So I need help. What information about system can help me? What code I should use? Is somebody has same problems? Application uses old cog VM (maybe one of first distributions from Eliot) and Pharo1.1. Application uses continuations actively. I want try updated VM. What version I should use? I need most reliable cog (not latest I think). Best regards, Denis