should be using JavaSE-1.6 VM, and .classpath, codegen.targetPlatform, compliance and source should also all be 1.6
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>com.nokia.carbide.cpp.uidesigner.doc.user</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
</buildSpec>
<natures>
</natures>
</projectDescription>