Index: generic/nsf.c
===================================================================
diff -u -r278b7a6dd6571b2f8230bd593f297c1fce4186bb -re61fd307b1eefb23fb55c9634b623203ce9d92e1
--- generic/nsf.c	(.../nsf.c)	(revision 278b7a6dd6571b2f8230bd593f297c1fce4186bb)
+++ generic/nsf.c	(.../nsf.c)	(revision e61fd307b1eefb23fb55c9634b623203ce9d92e1)
@@ -32441,6 +32441,7 @@
     /* even number of arguments (incl. method) 
      * -> level specifier considered present 
      */
+    frameInfoObj = NULL;
     frameInfo = ObjStr(objv[1]);
     i = 2;
   } else {