ExtensibleXmlParser error : Cannot resolve 'bpsim:Scenario' to a type definition for element 'bpsim:Scenario'. in BPM Suite

Issue

• I get the following errors when I build a project

16:42:23,358 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 2, 687): cvc-elt.1.a: Cannot find the declaration of element 'bpmn2:definitions'.
16:42:23,360 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 45, 63): cvc-elt.4.2: Cannot resolve 'dc:Point' to a type definition for element 'di:waypoint'.
...
16:42:23,361 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 57, 90): cvc-elt.4.2: Cannot resolve 'bpsim:Scenario' to a type definition for element 'bpsim:Scenario'.
16:42:23,361 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 58, 93): cvc-elt.4.2: Cannot resolve 'bpsim:ScenarioParameters' to a type definition for element 'bpsim:ScenarioParameters'.
16:42:23,361 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 59, 151): cvc-elt.4.2: Cannot resolve 'bpsim:ElementParameters' to a type definition for element 'bpsim:ElementParameters'.
16:42:23,362 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 60, 67): cvc-elt.4.2: Cannot resolve 'bpsim:TimeParameters' to a type definition for element 'bpsim:TimeParameters'.
16:42:23,362 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 61, 64): cvc-elt.4.2: Cannot resolve 'bpsim:Parameter' to a type definition for element 'bpsim:ProcessingTime'.
16:42:23,362 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 65, 67): cvc-elt.4.2: Cannot resolve 'bpsim:CostParameters' to a type definition for element 'bpsim:CostParameters'.
16:42:23,362 ERROR [org.drools.core.xml.ExtensibleXmlParser] (EJB default - 9) (null: 66, 58): cvc-elt.4.2: Cannot resolve 'bpsim:Parameter' to a type definition for element 'bpsim:UnitCost'.
...