Generated WSDL fails to resolve when packaged in contribution

I attempted to package a WSDL in a contribution that was previously generated using the WSDL deployment process of binding.ws and received a ContributionException with the following cause:

org.apache.tuscany.sca.interfacedef.wsdl.impl.InvalidWSDLException: The fault message MUST have a single part .

In this case I was attempting to use interface.wsdl with empty binding.ws with the following SCDL:

<?xml version="1.0" encoding="UTF-8"?>
<composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
targetNamespace="http://www.ibm.com/samples/sca/calculator"
name="CalculatorLocatorComposite">

<component name="CalculatorLocatorComponent">
<implementation.java class="calculator.CalculatorLocatorImpl"/>
<reference name="calculator" target="CalculatorComponent">
<interface.wsdl interface="http://calculator/#wsdl.interface(CalculatorService)"/>
<binding.ws/>
</reference>
</component>

</composite>

The failure occurs during wsdlFactory.createWSDLInterface in WSDLInterfaceProcessor

private WSDLInterface resolveWSDLInterface(WSDLInterface wsdlInterface, ModelResolver resolver) throws ContributionResolveException {

if (wsdlInterface != null && wsdlInterface.isUnresolved()) {

// Resolve the WSDL interface
wsdlInterface = resolver.resolveModel(WSDLInterface.class, wsdlInterface);
if (wsdlInterface.isUnresolved()) {

// If the WSDL interface has never been resolved yet, do it now
// First, resolve the WSDL definition for the given namespace
WSDLDefinition wsdlDefinition = wsdlFactory.createWSDLDefinition();
wsdlDefinition.setUnresolved(true);
wsdlDefinition.setNamespace(wsdlInterface.getName().getNamespaceURI());
WSDLDefinition resolved = resolver.resolveModel(WSDLDefinition.class, wsdlDefinition);
if (!resolved.isUnresolved()) {
wsdlDefinition.setDefinition(resolved.getDefinition());
wsdlDefinition.setLocation(resolved.getLocation());
wsdlDefinition.setURI(resolved.getURI());
wsdlDefinition.getImportedDefinitions().addAll(resolved.getImportedDefinitions());
wsdlDefinition.getXmlSchemas().addAll(resolved.getXmlSchemas());
wsdlDefinition.setUnresolved(false);
WSDLObject<PortType> portType = wsdlDefinition.getWSDLObject(PortType.class, wsdlInterface.getName());
if (portType != null) {
// Introspect the WSDL portType and add the resulting
// WSDLInterface to the resolver
try

{ wsdlDefinition.setDefinition(portType.getDefinition()); wsdlInterface = wsdlFactory.createWSDLInterface(portType.getElement(), wsdlDefinition, resolver); wsdlInterface.setWsdlDefinition(wsdlDefinition); resolver.addModel(wsdlInterface); }

catch (InvalidInterfaceException e)

{ ContributionResolveException ce = new ContributionResolveException(e); error("ContributionResolveException", wsdlFactory, ce); //throw ce; }

}

I am attaching the generated WSDL.