Web service proxy generation error

Hello All,

         While generating a web-service proxy I'm encountering errors as follows:

1. Proxy-Generierung: Fehler aufgetreten   

2. Exception occurred in library handler   

3. Incorrect value: Schema ohne targetNamespace darf keine Unterelemente beinhalten ausser xsd:import/xsd:include/xsd:annotation

The screenshot is also attached for reference.

This might be a very dumb question to ask but can anyone please help me with this.

Regards,

Anubhab