Mark Thanks for the info - although it was not actually the solution to my problem, it prompted me to look again at my assertion that there were not any null values. In actual fact answerData[0] was null ( I should have been checking for answerData[100]) and this was causing the error.
You modified syntax is much tidier; I'm now using the following format: $a : Answer(answerData[0] != null && answerData[0].value_str == "Valves") This prevents the prior null pointer exception. Thanks for your input. David -- View this message in context: http://drools.46999.n3.nabble.com/Condition-syntax-to-access-Map-tp3204429p3205961.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
