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   3410   Unknown alias name used with field name in 
              AX_ExprValid() expression

   Problem:   Error occurred in the Advantage Expression Engine parser.
   A field name within the AX_ExprValid() expression was aliased by an
   unknown alias name.

   Solution:  Advantage only supports table aliases for the current
   work area.  If an alias to another work area is referenced, this error
   will result.  Verify the alias name is spelled properly.