Index: trunk/Ohana/src/opihi/cmd.data/center.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/center.c	(revision 5846)
+++ trunk/Ohana/src/opihi/cmd.data/center.c	(revision 7917)
@@ -16,5 +16,5 @@
 
   if ((argc != 3) && (argc != 4)) {
-    fprintf (stderr, "USAGE: center x y [zoom]\n");
+    gprint (GP_ERR, "USAGE: center x y [zoom]\n");
     return (FALSE);
   }