--- ray/src/gen/gencat.c	2003/11/16 10:29:38	2.5
+++ ray/src/gen/gencat.c	2007/09/20 21:28:35	2.6
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: gencat.c,v 2.5 2003/11/16 10:29:38 schorsch Exp $";
+static const char	RCSid[] = "$Id: gencat.c,v 2.6 2007/09/20 21:28:35 greg Exp $";
 #endif
 /*****************************************************************************
   This program is to make series of right triangles forming hyperbolic cosin
@@ -91,7 +91,8 @@ char *argv[];
    int  n;
 
    if (argc != 11) {
-      fprintf(stderr, "Usage: gencat material name x0 y0 z0 x1 y1 z1 k d\n");
+      fprintf(stderr, "Usage: %s  material name x0 y0 z0 x1 y1 z1 k d\n",
+      		argv[0]);
       exit(1);
    }