Index: openacs-4/packages/xotcl-request-monitor/www/running.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-request-monitor/www/running.tcl,v
diff -u -N -r1.10.2.2 -r1.10.2.3
--- openacs-4/packages/xotcl-request-monitor/www/running.tcl	8 Jul 2019 20:29:16 -0000	1.10.2.2
+++ openacs-4/packages/xotcl-request-monitor/www/running.tcl	1 Nov 2019 13:20:13 -0000	1.10.2.3
@@ -75,11 +75,20 @@
 if {[ns_info name] eq "NaviServer"}  {
   foreach {entry} $writer_requests {
     if {[llength $entry] == 8} {
+      #
+      # Versions before rate management.
+      #
       lassign $entry starttime thread driver ip fd remaining done clientdata
+    } elseif {[llength $entry] == 10} {
+      #
+      # In some versions of NaviServer, pool can be empty.
+      #
+      lassign $entry starttime thread driver ip fd remaining done targetRate actualRate clientdata
     } elseif {[llength $entry] == 11} {
       lassign $entry starttime thread driver pool ip fd remaining done targetRate actualRate clientdata
     } else {
       ns_log notice "ns_writer list returns unknown number ([llength $entry]) of elements"
+      continue
     }
     lassign $clientdata requestor url
     set size [expr {$remaining+$done}]