Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the discussion "Re: Can guvnor maintain multiple versions of a BPMN definition with same id?" To view the discussion, visit: https://community.jboss.org/message/826993#826993 -------------------------------------------------------------- that is correct, you cannot have same process id for different process definitions within same kbase. If you try to do that one will override the other and the order of override will be same as the order of adding resources to knowledge base. you can still use version number as part of the runtime, so the scenario is: * create process definition with id abc, name process1 and version 1 * create process definition with id abcd, name process1, version 2 with that you can have both versions running in the same kbase and ksession as the ids are unique. Then you can use some helper classes to start process by name that will take into account the version number and ensure that the latest version will be used. See http://docs.jboss.org/jbpm/v5.4/javadocs/org/jbpm/process/instance/StartP... this helper class for details it will work fine as long as you have them separated. Consider case that you model process version 1 deploy it to runtime start process of it and then you go and change the exact same process definition that will cause the situation where new process definition will be replaced. Most important piece of information is when you do new version of the process make a copy of the origin process def and work on the copy to produce new version, don't change the existing one as it will impact currently running instances of that process id. see comment above. And in general, Guvnor is authoring tool based on JCR so it does support versioning of assets it maintains, but it's not the same versioning you have in mind. It keeps versions of the asset modifications, like history of what has changed and when, etc. It does not affect the runtime engine. To keep the isolation between running instances and version of the process make sure that you have process definition versions in separate files, that way all will work properly as it will be able to refer to the version it needs Again Guvnor does not deal with it, there is KnowledgeAgent that transfers the build packages to runtime environment as soon as they are ready to update the kbase in the runtime. With that all rules given above apply and might be that you would need to upgrade the process instance if that is the strategy you have chosen - for example you need to change given version of the process definition instead of creating new one. HTH -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/826993#826993] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]