Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the discussion "Re: jBPM 5.4 simultaneous connection problem" To view the discussion, visit: https://community.jboss.org/message/789697#789697 -------------------------------------------------------------- as the demo setup uses file based H2 data base that has restrictions to allow only single process to access the data base thus you see this error. To overcome this either use "real" data base (like mysql, postgresql, etc) or reconfigure H2 to ran as a server. HTH -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/789697#789697] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]