Where are those getApplicationItem() / getAdmissionItem() / getAttachment() functions defined? Davide p.s. you can probably remove that eval at the end of the rule... you could write e.g. ApplicationItem( this != null ), but even this is not needed since "from" will automatically filter out any null value from whatever getApplication() returns. Actually, it will also filter out any object which is not an instance of ApplicationItem. The same applies to the others. -- View this message in context: http://drools.46999.n3.nabble.com/unable-to-resolve-method-using-strict-m... Sent from the Drools: User forum mailing list archive at Nabble.com.