I have solved the problem. The list and variable must be declared in the header, using an import and variable element. I can now refer to the variable in an action. This is the posting that helped me find the answer: http://drools-java-rules-engine.46999.n3.nabble.com/How-to-use-Ruleflow-F... Thanks. This message may contain confidential and privileged information and is intended solely for the use of the named addressee. Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorised. If you are not the intended recipient please notify us immediately by returning the e-mail to the originator and then immediately delete this message. Although we attempt to sweep e-mail and attachments for viruses, we do not guarantee that either are virus-free and accept no liability for any damage sustained as a result of viruses. Please refer to http://www.bnymellon.com/disclaimer/piml.html for certain disclosures.