Workaround: When generating the artifacts for Compiled XML conversion you can use the wizard to change the root element name to match the Interpretive XML conversion. This new option called "Root element name" is located in the Generation Options page, on the WSDL and XSD options tab, in the request and response XML Schema properties group.
For example, the COBOL group named A-B-C will cause the Interpretive conversion artifacts to have the message root element name "a_b_c". The default Compiled conversion artifacts will have the root element name "ABC". As described earlier you can change "ABC" in the wizard to "a_b_c" to match with the WSDL generated for the interpretive conversion.