Suppose we have this structure in a dmn file, named as dmn1.xml
<decision name="decision1"> <informationRequirement> <requiredDecision href="http://www.example.org/dmn2.xml#decision2"/> </informationRequirement> </decision>
and have another dmn2.xml, which can be referenced through a HTTP url, http://www.example.org/dmn2.xml
<decision name="decision2"> </decision>
I have omitted decision logic section for these decisions for the sake of brevity.
Given this scenario, we are not able to import decision2 into decision1, though it is a valid use case as explained in section 12.3.2 of DMN specification.
We get an error, org.camunda.bpm.dmn.engine.impl.transform.DmnTransformException: DMN-02004 Error while transforming decisions: Unable to find a model element instance for id decision2