Index: trunk/Ohana/src/opihi/cmd.data/tvgrid.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/tvgrid.c	(revision 5846)
+++ trunk/Ohana/src/opihi/cmd.data/tvgrid.c	(revision 7917)
@@ -24,6 +24,6 @@
   
   if (argc != 3) {
-    fprintf (stderr, "USAGE: tvgrid (overlay) (buffer)\n");
-    fprintf (stderr, " (overlay) may be: red, green, blue, yellow\n");
+    gprint (GP_ERR, "USAGE: tvgrid (overlay) (buffer)\n");
+    gprint (GP_ERR, " (overlay) may be: red, green, blue, yellow\n");
     return (FALSE);
   }
@@ -34,5 +34,5 @@
   XY_to_RD (&ra0, &dec0, 0.0, 0.0, &coords);
   XY_to_RD (&ra1, &dec1, (double)buf[0].header.Naxis[0], (double)buf[0].header.Naxis[1], &coords);
-  fprintf (stderr, "%f %f  %f %f\n", ra0, dec0, ra1, dec1);
+  gprint (GP_ERR, "%f %f  %f %f\n", ra0, dec0, ra1, dec1);
   
   Noverlay = 0;
@@ -64,5 +64,5 @@
   ndig1 = 3 + log10(MAX(dec0, dec1)) + ndig2;
   sprintf (format, "%%%d.%df", ndig1, ndig2);
-  fprintf (stderr, "format: %s..\n", format);
+  gprint (GP_ERR, "format: %s..\n", format);
 
   NX = buf[0].header.Naxis[0];
@@ -118,5 +118,5 @@
   ndig1 = 3 + log10(MAX(ra0, ra1)) + ndig2;
   sprintf (format, "%%%d.%df", ndig1, ndig2);
-  fprintf (stderr, "format: %s..\n", format);
+  gprint (GP_ERR, "format: %s..\n", format);
 
   dDEC = MAX (fabs(dec1 - dec0) / 100.0, 0.1);