Not able to save Soap UI Project

Hi, I am using Soap UI Pro 5.0.0 to save a composite project and getting following error:

 Tue Sep 08 15:20:34 IST 2015:ERROR:java.lang.NullPointerException

   java.lang.NullPointerException

                at com.eviware.soapui.impl.wadl.inference.support.InferredSchemaImpl.getXsdForNamespace(InferredSchemaImpl.java:82)

                at com.eviware.soapui.impl.wadl.support.GeneratedWadlDefinitionLoader.loadXmlObject(GeneratedWadlDefinitionLoader.java:44)

                at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getDefinitionParts(SchemaUtils.java:539)

                at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.selectDefinitionParts(SchemaUtils.java:569)

                at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getDefinitionParts(SchemaUtils.java:547)

                at com.eviware.soapui.impl.wsdl.support.xsd.SchemaUtils.getDefinitionParts(SchemaUtils.java:528)

                at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionCache.update(AbstractDefinitionCache.java:101)

                at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionContext$Loader.construct(AbstractDefinitionContext.java:240)

                at com.eviware.soapui.support.swing.SwingWorkerDelegator.construct(SwingWorkerDelegator.java:50)

                at com.eviware.soapui.support.swing.SwingWorker$2.run(SwingWorker.java:153)

                at java.lang.Thread.run(Unknown Source)