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diff --git a/sys/imio/impmsne3.x b/sys/imio/impmsne3.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<imio.h>
+
+# IM_PMSNE3 -- Pixel mask section not empty.
+
+bool procedure im_pmsne3 (im, x1,x2, y1,y2, z1,z2)
+
+pointer	im			#I image descriptor
+int	x1, x2			#I section to be tested
+int	y1, y2			#I section to be tested
+int	z1, z2			#I section to be tested
+
+long	vs[3], ve[3]
+bool	pm_sectnotempty()
+
+begin
+	vs[1] = x1;  vs[2] = y1;  vs[3] = z1
+	ve[1] = x2;  ve[2] = y2;  ve[3] = z2
+
+	return (pm_sectnotempty (IM_PL(im), vs, ve, 3))
+end