I get this error when I execute Windup against the Seam booking example that shipped with JBoss 5.1 :

$ windup-migrate-app --input /home/sgilda/Downloads/JBoss-OtherDownloads/jboss-eap-5.2/seam/examples/booking/ --output /home/sgilda/temp/windup-report-seam-booking-01 --packages org.jboss.seam
**ERROR** Error while executing 'Windup Migrate App'
**ERROR** Adding this property for key [system%&%SchemaName] and value [rt%namespaceURI] violates a uniqueness constraint [com.thinkaurelius.titan.graphdb.types.system.BaseKey$1@7967798b]
**INFO** (type "export VERBOSE=true" to enable stack traces)
**ERROR** Adding this property for key [system%&%SchemaName] and value [rt%namespaceURI] violates a uniqueness constraint [com.thinkaurelius.titan.graphdb.types.system.BaseKey$1@7967798b]
[JBoss-OtherDownloads]$ windup-migrate-app --input /home/sgilda/Downloads/JBoss-OtherDownloads/jboss-eap-5.2/seam/examples/booking/ --output /home/sgilda/temp/windup-report-seam-booking-01 --packages org.jboss.seam
**ERROR** Error while executing 'Windup Migrate App'
**ERROR** Adding this property for key [system%&%SchemaName] and value [rt%namespaceURI] violates a uniqueness constraint [com.thinkaurelius.titan.graphdb.types.system.BaseKey$1@7967798b]
**INFO** (type "export VERBOSE=true" to enable stack traces)
**ERROR** Adding this property for key [system%&%SchemaName] and value [rt%namespaceURI] violates a uniqueness constraint [com.thinkaurelius.titan.graphdb.types.system.BaseKey$1@7967798b]