Index: doc/example-scripts/tk-spread.tcl
===================================================================
diff -u -r9ab6a86b4aee196f04363d13e5eadbdfdb814a06 -rd31c271afb2488abafa0642b07538a3e62106130
--- doc/example-scripts/tk-spread.tcl	(.../tk-spread.tcl)	(revision 9ab6a86b4aee196f04363d13e5eadbdfdb814a06)
+++ doc/example-scripts/tk-spread.tcl	(.../tk-spread.tcl)	(revision d31c271afb2488abafa0642b07538a3e62106130)
@@ -6,7 +6,7 @@
 # image::tk-spread.png[]
 #
 package require Tk
-package require nx::callback
+package require nx::trait
 
  ##############################################################################
  # Class SpreadSheet
@@ -31,7 +31,7 @@
    #
    # Use the nx callback trait 
    #
-   :require trait nx::TCallback
+   :require trait nx::traits::callback
    
    #
    # The method "cell" hides the internal respresentation and sets a