Index: openacs-4/packages/acs-tcl/tcl/utilities-procs-naviserver.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/utilities-procs-naviserver.tcl,v
diff -u -r1.3 -r1.4
--- openacs-4/packages/acs-tcl/tcl/utilities-procs-naviserver.tcl	14 May 2018 13:22:24 -0000	1.3
+++ openacs-4/packages/acs-tcl/tcl/utilities-procs-naviserver.tcl	20 Dec 2018 18:14:55 -0000	1.4
@@ -23,7 +23,11 @@
             ad_urlencode_path).
     @see ad_urlencode_path
 } {
-    return [ns_urlencode -part path -- {*}[split $path /]]
+    if {$path ne ""} {
+        return [ns_urlencode -part path -- {*}[split $path /]]
+    } else {
+        return ""
+    }
 }
 
 ad_proc -public ad_urlencode_path { string } {