Index: trunk/Ohana/src/opihi/cmd.data/roll.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/roll.c	(revision 2598)
+++ trunk/Ohana/src/opihi/cmd.data/roll.c	(revision 7917)
@@ -8,5 +8,5 @@
 
   if (argc != 4) {
-    fprintf (stderr, "USAGE: roll <buffer> dx dy\n");
+    gprint (GP_ERR, "USAGE: roll <buffer> dx dy\n");
     return (FALSE);
   }
@@ -17,5 +17,5 @@
   dy = atof (argv[3]);
   if (dy != 0) {
-    fprintf (stderr, "only x rolls implemented for now\n");
+    gprint (GP_ERR, "only x rolls implemented for now\n");
   }