--- ray/src/common/instance.c	1989/02/02 10:34:35	1.1
+++ ray/src/common/instance.c	1989/07/27 22:25:56	1.3
@@ -44,7 +44,7 @@ int  flags;
 		sc->next = slist;
 		slist = sc;
 	}
-	if ((pathname = getpath(sname, libpath)) == NULL) {
+	if ((pathname = getpath(sname, libpath, R_OK)) == NULL) {
 		sprintf(errmsg, "cannot find octree file \"%s\"", sname);
 		error(USER, errmsg);
 	}
@@ -79,7 +79,7 @@ int  flags;
 		if (in->b.sca < 0.0)
 			in->b.sca = -in->b.sca;
 		in->obj = NULL;
-		(INSTANCE *)o->os = in;
+		o->os = (char *)in;
 	}
 	if (in->obj == NULL || (in->obj->ldflags & flags) != flags)
 		in->obj = getscene(o->oargs.sarg[0], flags);