DIFFEXMODEL

Message        This redeclaration of "<name>" specifies a different
               extern model than a previous declaration of the
               variable at <location>.

Description    Two declarations of the same variable use different
               extern models.  The extern model is specified by a
               #pragma extern_model directive that appears before
               the declaration in the source.  This redeclaration
               may cause unexpected behavior.

User Action    All declarations of a variable should use the same
               extern model.