Metamatrix simple-types xsd import prevents generation of cxf war file

1. Generate a model to expose through webservices that uses one of the datatypes from the http://www.metamatrix.com/metamodels/SimpleDatatypes-instance schema. [comment-1]
2. Select the model > Right Click > Modeling > Create Web Service
3. XSDs generated have the metamatrix schema import which uses "http://www.metamatrix.com/metamodels/SimpleDatatypes-instance" for the namespace AND the schema location.
4. Double clicking in the model explorer in one of this xsd trys to open it and hangs for a while.
[comment-2]
5. Select VDB > Modelling > Generate JbossWS-CXF War. This hangs for a long while and afterwards fails to generate the war file.

Is there a workaround for this?

comments:
[comment-1]: import a table from and Oracle DB that has a BigInteger. That will force the built-in schema to be added.
[comment-2]: create a VDB with generated models