NullPointerException in ADI doc creation after creating group validation on Account Flexfield.

I am trying to create a custom ADI to load a custom table which includes the Accounting Key Flexfield.  I am able to create the interface without any group/validation and the document creates without error.  Once I add a custom attribute and group validation for the accounting flexfield I get the following error:
8/9/13 10:26 AM AJPRequestHandler-HTTPThreadGroup-21 CRITICAL ERROR BneAbstractXMLServlet.doRequest(), fatal exception: java.lang.NullPointerException
8/9/13 10:26 AM AJPRequestHandler-HTTPThreadGroup-21 CRITICAL ERROR java.lang.NullPointerException
        at oracle.apps.bne.utilities.BneViewerServerUtils.getFlexListOfValues(BneViewerServerUtils.java:269)
        at oracle.apps.bne.integrator.document.BneOAExcelViewer.appendParentListOfValuesColumn(BneOAExcelViewer.java:2803)
        at oracle.apps.bne.integrator.document.BneOAExcelViewer.appendParentMethods(BneOAExcelViewer.java:2711)