I have the same problem. It seems like the drool eclipse plugin can't recognize third party classes (any jar files besides those within JRE runtime and Drools runtime). Despite of the error messages, you can execute the java application correctly.
However, I have asked around in this forum, in jira, and writing personal email to Kris Verlaenen and Mario Fusco, but no response at all!! Below are my posts regarding this problem: http://drools.46999.n3.nabble.com/rules-users-Drools-eclipse-plugin-problem-td4029476.html https://issues.jboss.org/browse/DROOLS-472 -- View this message in context: http://drools.46999.n3.nabble.com/Compilation-errors-in-Drools-examples-tp4027650p4029760.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users