--- ray/src/hd/rholo.c	1997/12/19 10:41:42	3.30
+++ ray/src/hd/rholo.c	1997/12/22 11:06:53	3.32
@@ -88,6 +88,8 @@ char	*argv[];
 			goto userr;
 		}
 						/* get root file name */
+	if (i >= argc)
+		goto userr;
 	rootname(froot, hdkfile=argv[i++]);
 						/* load variables? */
 	if (i < argc)
@@ -489,7 +491,7 @@ PACKET	*pl;
 		p->next = freepacks;
 		freepacks = p;
 	}
-	if (n2flush > 512*RPACKSIZ*nprocs) {
+	if (n2flush > 1024*RPACKSIZ*nprocs) {
 		hdflush(NULL);			/* flush holodeck buffers */
 		n2flush = 0;
 	}