Tried to Preview with 8.5 and single Teiid client plugin and received:java.lang.NullPointerException
at org.teiid.runtime.client.admin.ExecutionAdmin.undeployVdb(ExecutionAdmin.java:743)
at org.teiid.designer.runtime.TeiidServer.undeployVdb(TeiidServer.java:658)
at org.teiid.designer.runtime.preview.PreviewManager.previewSetup(PreviewManager.java:1458)
at org.teiid.designer.runtime.ui.preview.PreviewDataWorker$1.run(PreviewDataWorker.java:232)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)