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diff --git a/Dragon/src/AEXGNV.f b/Dragon/src/AEXGNV.f
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+*DECK AEXGNV
+      SUBROUTINE AEXGNV(ICHAMP,SEGMEN,TCHDIM,TCHTYP,TCHDKL,IDK,NV)
+*
+*-----------------------------------------------------------------------
+*
+*Purpose:
+* Localization of a specific segment component in a SAPHYR archive.
+* Component of a FORTRAN-77 emulator of the SAPHYR archive system.
+*
+*Copyright:
+* Copyright (C) 1999 Ecole Polytechnique de Montreal
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation; either
+* version 2.1 of the License, or (at your option) any later version
+*
+*Author(s): A. Hebert
+*
+*Parameters: input
+* ICHAMP  component index in segment (low integer value).
+* SEGMEN  integer segment.
+* TCHDIM  dimension of segment components.
+* TCHTYP  character type of segment components.
+* TCHDKL  position of segment components.
+*
+*Parameters: output
+* IDK     position of segment component with index ichamp.
+* NV      length of segment component with index ichamp.
+*
+*-----------------------------------------------------------------------
+*
+      INTEGER SEGMEN(*),TCHDIM(*),TCHTYP(*),TCHDKL(*)
+      CHARACTER TEXT4*4
+*
+      LONMOT=4
+      CALL LCMCAR(TEXT4,.FALSE.,TCHTYP(ICHAMP))
+      ND=TCHDIM(ICHAMP)
+      IDK=TCHDKL(ICHAMP+1)
+      NV=1
+      DO 100 ID=1,ND
+      NV=NV*SEGMEN(IDK+ID)
+  100 CONTINUE
+      IDKE=TCHDKL(ICHAMP)
+      IF(IDKE.LT.0) THEN
+        IDK=SEGMEN(1-IDKE)+1
+      ELSE
+        IDK=IDKE+1
+      ENDIF
+      IF(TEXT4(1:1).EQ.'C') IDK=(IDK-1)/LONMOT+1
+      RETURN
+      END