Manstis was right, I was trying to access Java class with the API for accessing declared (DRL) types. ValidationError class was created with Drools Workbench data modeller. I thought that data modeller creates declarative classes, like in Drools Guvnor. I imported ValidationError as normal Java class and and started to use as it as normal Java class and problem was solved. Sorry for all the trouble and thanks for help!
-Jarkko -- View this message in context: http://drools.46999.n3.nabble.com/NullPointerException-with-factType-get-fact-fieldname-tp4028688p4028753.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
