Can not build schema ..located at

Exception:

Exception: Can not build schema 'http://xmlns.oracle.com/ias/pcbpel/NotificationService' located at 'file:/C:/JDeveloper/mywork/SamplePOC/Project1/NotificationService.xsd'

NotificationService WSDL in MDS:

<definitions name="NotificationService_WSDL" targetNamespace="http://xmlns.oracle.com/ias/pcbpel/NotificationService" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://xmlns.oracle.com/ias/pcbpel/NotificationService" xmlns:ns1="http://IWSDLDocument1.xsd" xmlns:java="http://schemas.xmlsoap.org/wsdl/java/" xmlns:format="http://schemas.xmlsoap.org/wsdl/formatbinding/" xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/">
<types>
<schema targetNamespace="http://xmlns.oracle.com/ias/pcbpel/NotificationService1" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">
<import namespace="http://xmlns.oracle.com/ias/pcbpel/NotificationService" schemaLocation="NotificationService.xsd"/>
</schema>
<schema targetNamespace="http://xmlns.oracle.com/ias/pcbpel/NotificationService" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">
<element name="faultMessage" type="xsd:string"/>
</schema>
</types>
<message name="IMNotificationRequest">
<part name="IMPayload" type="tns:IMPayloadType"/>
</message>


Changed NotificationService WSDL in MDS:

<definitions name="NotificationService_WSDL" targetNamespace="http://xmlns.oracle.com/ias/pcbpel/NotificationService" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://xmlns.oracle.com/ias/pcbpel/NotificationService" xmlns:tns1="http://xmlns.oracle.com/ias/pcbpel/NotificationService/xsd" xmlns:ns1="http://IWSDLDocument1.xsd" xmlns:java="http://schemas.xmlsoap.org/wsdl/java/" xmlns:format="http://schemas.xmlsoap.org/wsdl/formatbinding/" xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/">
<types>
<xsd:schema>
<xsd:import namespace="http://xmlns.oracle.com/ias/pcbpel/NotificationServicexsd" schemaLocation="../../xsd/v1/NotificationService.xsd"/>
</xsd:schema>
<xsd:schema elementFormDefault="qualified">
<xsd:element name="faultMessage" type="xsd:string"/>
</xsd:schema>
</types>
<message name="IMNotificationRequest">
<part name="IMPayload" type="tns1:IMPayloadType"/>
</message>

Cause:

SOA is very strict in namespaces.  

•   Open the wsdl in JDEV to find cause of the issues.
•   Check the import schema elements for discrepencies.
•   Check if Schema being imported has same targetNamespace as the WSDL's      targetNameSpace.  Then import the same targetNamespace.