Description
Had an old-old UML metamodel in workspace which had invalid metamodel type in it. Though Designer could handle it and show some model contents, the Preview Setup resulted in NPE.
java.lang.NullPointerException
at org.teiid.designer.runtime.preview.PreviewManager.isPreviewable(PreviewManager.java:218)
at org.teiid.designer.runtime.preview.jobs.ModelProjectOpenedJob.process(ModelProjectOpenedJob.java:81)
Need to check for NULL metamodelDescriptor and return FALSE