Apigee X deployment error : messaging.resource.WSDLCompileFailed

[bablisah]

Hi , 
I am trying to validate the request against a wsdl file, it has some xsds import as well. 

All the files are in resources section where wsdl files are in wsdl folder and xsds in xsd folder.
Importing xsds into wsdl syntax is  like

<wsdl:types>
   <xsd:schema targetNamespace="urn:abc.xyz.com/Process">
     <xsd:include schemaLocation="xsd://ProcessIdentity.xsd"/>
     <xsd:include schemaLocation="xsd://ProcessPayload.xsd"/>
   </xsd:schema>
</wsdl:types>

while deploying it fails with this error "messaging.resource.WSDLCompileFailed: "Compilation of wsdl resource process.wsdl failed".

Please help to resolve this.