Index: openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl,v
diff -u -N -r1.2 -r1.3
--- openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl	9 Apr 2006 00:09:51 -0000	1.2
+++ openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl	7 Aug 2006 19:10:11 -0000	1.3
@@ -7,6 +7,11 @@
     @cvs-id $Id$
 }
 
+if {[info command ::thread::mutex] eq ""} {
+  ns_log notice "libthread does not appear to be available, NOT loading bgdelivery"
+  return
+}
+
 ::xotcl::THREAD create bgdelivery {
   ###############
   # File delivery