Cause
This error occurs if a control instance is encountered while building a form at run time that is not valid or is not a subclass of a non-abstract JADE
Additional information is logged in the JADE messages (jommsg.log) log file, listing the object identifier (OID) and the class name of the object, if possible.
Action
This is an internal error. If your JADE licenses include support, contact your local JADE support center or JADE Support. The workaround is to reload the form from a scm and ddb file.