dmn integration with bpmn : does not recognize 'years and months duration' function

[Ravi Mangalagiri]

Hi Kogito Team,

I built a small example project plugging 2 dmns in a bpmn and got the following exception.

 Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.kie.kogito.process.ProcessInstanceExecutionException: Process instance with id 55f1d72b-d61f-44b7-9953-d85e077ecf0b failed becuase of java.lang.RuntimeException - DMN result errors:: Message [id=0, level=ERROR, path=null, line=24, column=-1
   text=DMN: FEEL ERROR while evaluating literal expression 'years and months duration(s.dob, today())': Unable to find function 'years and months duration( lass org.kie.dmn.feel.runtime.functions.YearsAndMonthsFunctio )' (DMN id: _BA857A0A-5548-4F6D-9631-2B2E2A463F5E, FEEL expression evaluation error) ]] with root cause

java.lang.RuntimeException: DMN result errors:: Message [id=0, level=ERROR, path=null, line=24, column=-1
   text=DMN: FEEL ERROR while evaluating literal expression 'years and months duration(s.dob, today())': Unable to find function 'years and months duration( lass org.kie.dmn.feel.runtime.functions.YearsAndMonthsFunctio )' (DMN id: _BA857A0A-5548-4F6D-9631-2B2E2A463F5E, FEEL expression evaluation error) ]
        at org.jbpm.workflow.instance.node.RuleSetNodeInstance.internalTrigger(RuleSetNodeInstance.java:123) ~[jbpm-flow-1.20.0.Final.jar:1.20.0.Final]
        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:225) ~[jbpm-flow-1.20.0.Final.jar:1.20.0.Final]
        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:424) ~[jbpm-flow-1.20.0.Final.jar:1.20.0.Final]
        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:409) ~[jbpm-flow-1.20.0.Final.jar:1.20.0.Final]
        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:379) ~[jbpm-flow-1.20.0.Final.jar:1.20.0.Final]
        at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:71) ~[jbpm-flow-1.20.0.Final.jar:1.20.0.Final]

Not sure what I am missing. Sample project attached.

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Ravi Mangalagiri

[Matteo Mortari]

Hi Ravi,

the "years and month duration()" built-in function requires 2 parameters of the same type: https://kiegroup.github.io/dmn-feel-handbook/#years-and-months-duration-from-to

It is very likely the case that `s.dob` is not a FEEL date, given today() always returns a FEEL date, hence the error.

I would suggest you ensure you are passing s.dob as a FEEL date to the DMN model, or that you convert s.dob as a FEEL date otherwise.

Hope this helps!

MM

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Matteo Mortari

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[Ravi Mangalagiri]

Let me investigate more...

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Ravi Mangalagiri