Index: trunk/ippTools/src/regtool.c
===================================================================
--- trunk/ippTools/src/regtool.c	(revision 8187)
+++ trunk/ippTools/src/regtool.c	(revision 8188)
@@ -442,5 +442,5 @@
     }
     if (isnan(ra)) {
-        psError(PS_ERR_UNKNOWN, true, "-airmass is required");
+        psError(PS_ERR_UNKNOWN, true, "-ra is required");
         return NULL;
     }