<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'>There is another mystery : why this is working when getting rules from a DRL file and not from Guvnor ...<br>Did you add the POJO model into the Guvnor's package ?<br>But if this is it, package compilation should raise a compilation error ...<br><br>What is sure is that the problem does not comes from the rules, as the stack trace shows an "insert" call outside the rules, otherwise there would be a reteoo...ConsequenceInvocator (something like that) before ..<br><br>And a last question : is "org.tass.utils.ExpertSystemManager" a class from you, or does it take place into another third-party framework (that could use a different or modified version of drools).<br><br></div></body></html>