WSDL2JAVA - Nillable

Bonjour

J'essais de générer mes classe client pour attaqué un webservice existant mais j'ai une erreur de parsing du fichier wsdl.
Le fichier wsdl se trouve à l'adresse suivante : http://api.delcampe.net/soap.php?wsdl

voila le stacktrace de l'erreur :

Code:

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Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException: Error parsing WSDL
	at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.<init>(CodeGenerationEngine.java:156)
	at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35)
	at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:24)
Caused by: javax.wsdl.WSDLException: WSDLException (at /definitions/message[29]/part[2]): faultCode=INVALID_WSDL: Encountered illegal extension attribute 'nillable'. Extension attributes must be in a namespace other than WSDL's.
	at com.ibm.wsdl.xml.WSDLReaderImpl.parseExtensibilityAttributes(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.parsePart(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.parseMessage(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.parseDefinitions(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source)
	at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source)
	at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.readInTheWSDLFile(CodeGenerationEngine.java:288)
	at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.<init>(CodeGenerationEngine.java:111)
	... 2 more

Merci de votre aide.