Drools 5 had to change it's API mainly to overcome the rule-centric in favour of a knowledge centric approach. See http://hudson.jboss.org <http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/tr...;. Note that Drools Flow 5 is now able to act as a noticable BPM-system and other subsystems like Fusion/Solver etc. completes the functionality. However, Drools 5 is not yet documented enough. Even if the Seam integration fix should not be hard, I assume that Drools 5 has to be stable until integration issues can be tackled. aubertinp wrote: I am trying to work with drools 5 BRMS (RC1) and SEAM 2.1.1. I want use JBPM with rules from the BRMS. I am not able to make it work, i guess i have some libraries problems. I tried to change drools libraries from SEAM with drools libraries from DROOLS 5 but i keep getting this error: ... Caused by: java.lang.NoSuchMethodError: org.drools.WorkingMemory.fireAllRules()

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