Index: openacs-4/packages/xowiki/tcl/resource-init.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/resource-init.tcl,v
diff -u -r1.3.2.9 -r1.3.2.10
--- openacs-4/packages/xowiki/tcl/resource-init.tcl	7 May 2020 11:02:51 -0000	1.3.2.9
+++ openacs-4/packages/xowiki/tcl/resource-init.tcl	13 Jul 2020 12:02:33 -0000	1.3.2.10
@@ -28,9 +28,9 @@
 #
 set resDir $::acs::rootdir/packages/xowiki/www/resources
 foreach variant {yui bootstrap3} {
-  if {![file exists $resDir/xowiki-$variant.css]
-      || [file mtime $resDir/xowiki-$variant.css] < [file mtime $resDir/xowiki.css]
-      || [file mtime $resDir/xowiki-$variant.css] < [file mtime $resDir/xowiki-$variant-specific.css]
+  if {![ad_file exists $resDir/xowiki-$variant.css]
+      || [ad_file mtime $resDir/xowiki-$variant.css] < [ad_file mtime $resDir/xowiki.css]
+      || [ad_file mtime $resDir/xowiki-$variant.css] < [ad_file mtime $resDir/xowiki-$variant-specific.css]
     } {
     set content ""
     set F [open $resDir/xowiki.css]; append content [read $F] \n; close $F