Huisheng Xu [http://community.jboss.org/people/rebody] replied to the discussion "jBPM 4.3 starting a sub-process after a state node will fail" To view the discussion, visit: http://community.jboss.org/message/535445#535445 -------------------------------------------------------------- Hi Tun,   I have tried Maciej's example and also can't see any exception as you said.   I went back to see your original Exception again, and found a possibility.   When you execute SignalExecutionById() method, pvm invoke the AcquireDbidBlockCmd to get next dbid from Database, it is not happened in my unit test. I think it maybe cause all of above, I will keep digging. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/535445#535445] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]