MetaMatrix Dependency Report gives "TransformationHelper.getTransformationMappingRoot:null or invalid target" error

!ENTRY org.eclipse.ui 4 0 2010-08-03 18:06:41.688
!MESSAGE TransformationHelper.getTransformationMappingRoot:null or invalid target.
!STACK 0
java.lang.IllegalArgumentException: TransformationHelper.getTransformationMappingRoot:null or invalid target.
        at com.metamatrix.modeler.internal.transformation.util.TransformationHelper.getTransformationMappingRoot(TransformationHelper.java:2468)
        at com.metamatrix.modeler.internal.transformation.util.TransformationHelper.getTransformationMappingRoot(TransformationHelper.java:2514)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.getTransformation(SqlDependencyHelper.java:261)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.addDependencies(SqlDependencyHelper.java:131)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.addDependencies(SqlDependencyHelper.java:149)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.addDependencies(SqlDependencyHelper.java:149)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.addDependencies(SqlDependencyHelper.java:149)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.findSourceTables(SqlDependencyHelper.java:113)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.loadSourceTables(SqlDependencyHelper.java:97)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.init(SqlDependencyHelper.java:91)
        at com.metamatrix.modeler.transformation.ui.util.SqlDependencyHelper.<init>(SqlDependencyHelper.java:79)
        at com.metamatrix.modeler.transformation.ui.actions.GenerateDependencyReportAction.doRun(GenerateDependencyReportAction.java:88)
        at com.metamatrix.ui.actions.AbstractAction.run(AbstractAction.java:557)
        at org.eclipse.jface.action.Action.runWithEvent(Action.java:996)....