Index: library/nx/nx.tcl
===================================================================
diff -u -r9abeee97470aeca0efde319271794f7f76903670 -rb2460ba0f8fef2b988ae3f77d6c34e6d7af7e69c
--- library/nx/nx.tcl	(.../nx.tcl)	(revision 9abeee97470aeca0efde319271794f7f76903670)
+++ library/nx/nx.tcl	(.../nx.tcl)	(revision b2460ba0f8fef2b988ae3f77d6c34e6d7af7e69c)
@@ -1184,6 +1184,7 @@
 	}
       }
     }
+    if {[info exists :arg]} {lappend options arg=${:arg}}
     if {${:required}} {lappend options required}
     if {${:convert}} {lappend options convert}
     if {$withMultiplicity && [info exists :multiplicity] && ${:multiplicity} ne "1..1"} {
@@ -1192,7 +1193,7 @@
     if {$withSubstdefault && [info exists :substdefault] && ${:substdefault}} {
       lappend options substdefault
     }
-    #puts stderr "*** getParameterOptions [self] return $options"
+    #puts stderr "*** getParameterOptions [self] returns '$options'"
     return $options
   }