<inherits name="com.yellowbook.mdb.NationalResidential"/>
   <source path='com.yellowbook.mdb' />

Unable to find 'com/yellowbook/mdb/NationalResidential.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?

<source path='shared'/>

<source path='shared'/>

<inherits name='com.project2'/> //same for project 1