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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc1635.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc1635.vhd
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+
+-- Copyright (C) 2001 Bill Billowitch.
+
+-- Some of the work to develop this test suite was done with Air Force
+-- support.  The Air Force and Bill Billowitch assume no
+-- responsibilities for this software.
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: tc1635.vhd,v 1.2 2001-10-26 16:29:42 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c08s12b00x00p05n01i01635ent IS
+END c08s12b00x00p05n01i01635ent;
+
+ARCHITECTURE c08s12b00x00p05n01i01635arch OF c08s12b00x00p05n01i01635ent IS
+
+BEGIN
+  TESTING: PROCESS
+    type PH is range 1 to 24
+      units
+        U;
+        X=3 U;
+        Y=2 X;
+      end units;
+    subtype PH1 is PH range X to Y;
+    function J return PH1 is
+    begin
+      return X;
+    end J;
+    variable k : PH1 := 2 X; 
+  BEGIN
+    k := J;
+    assert NOT(k = X)
+      report "***PASSED TEST: c08s12b00x00p05n01i01635" 
+      severity NOTE;
+    assert (k = X) 
+      report "***FAILED TEST: c08s12b00x00p05n01i01635 - The return type must be the same base tyep declared in the specification of the function."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c08s12b00x00p05n01i01635arch;