Index: generic/nsf.tcl
===================================================================
diff -u -rb4f3311ee912eee7ac2d3bb7a44f2f4ce41d7261 -rb0761fb924d86ede15e87db207ed68eccfce2d39
--- generic/nsf.tcl	(.../nsf.tcl)	(revision b4f3311ee912eee7ac2d3bb7a44f2f4ce41d7261)
+++ generic/nsf.tcl	(.../nsf.tcl)	(revision b0761fb924d86ede15e87db207ed68eccfce2d39)
@@ -141,7 +141,13 @@
   #
   if {[info command ::ns_log] ne ""} {
     proc ::nsf::log {level msg} {
-      ns_log $level "nsf: $msg"
+      # The function might be called in situations in
+      # aolserver/naviserver, where ns_log is not available.
+      if {[info command ::ns_log] ne ""} {
+	::ns_log $level "nsf: $msg"
+      } else {
+	puts stderr "$level: $msg"
+      }
     }
   } else {
     proc ::nsf::log {level msg} {