Unknown Namespace when creating Client Proxy

Hi,
I'm trying to generate a client proxy using Local File.
It gives error
Incorrect value: Unknown Namespace urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2
The wsdl file does not give any error.
This error seems to be coming from XSD file named UBL-CommonAggregateComponents-2.0.xsd
Below is part of this XSD file.
Can you tell me what is the problem here.
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
            xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
            xmlns:udt="urn:un:unece:uncefact:data:specification:UnqualifiedDataTypesSchemaModule:2"
            xmlns:ccts="urn:un:unece:uncefact:documentation:2"
            xmlns:qdt="urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"
            targetNamespace="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
            elementFormDefault="qualified"
            attributeFormDefault="unqualified"
            version="2.0"><xsd:import namespace="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
               schemaLocation="UBL-CommonBasicComponents-2.0.xsd"/>
   <xsd:import namespace="urn:un:unece:uncefact:data:specification:UnqualifiedDataTypesSchemaModule:2"
               schemaLocation="UnqualifiedDataTypeSchemaModule-2.0.xsd"/>
   <xsd:import namespace="urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"
               schemaLocation="UBL-QualifiedDatatypes-2.0.xsd"/>
Thanks
Girishkumar

Hi ,
Make sure no restriction from firewall on proxy settings.
Namespace you are using for client proxy may not be available for consumption/not published.
Also , Try to check connection.
OSS note 944029 will give you SAP restrictions on name space.
Regards
Nagaraju

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