Index: openacs-4/packages/xotcl-core/www/show-class-graph.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/www/show-class-graph.tcl,v
diff -u -N -r1.11 -r1.11.2.1
--- openacs-4/packages/xotcl-core/www/show-class-graph.tcl	2 Jul 2015 09:22:40 -0000	1.11
+++ openacs-4/packages/xotcl-core/www/show-class-graph.tcl	27 Mar 2017 10:37:42 -0000	1.11.2.1
@@ -28,10 +28,10 @@
 #ns_log notice "png $tmpnam dot $tmpnam.dot"
 set f [open "|$dot  -T$format -o $tmpfile" w]; puts $f $dot_code; close $f
 ns_returnfile 200 [ns_guesstype $tmpfile] $tmpfile
-file delete $tmpfile
+file delete -- $tmpfile
 
 #set f [open $tmpnam.dot w]; puts $f $dot_code; close $f
-#file delete $tmpnam.dot
+#file delete -- $tmpnam.dot
 
 
 #