Index: openacs-4/packages/acs-tcl/tcl/acs-permissions-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/acs-permissions-procs.tcl,v
diff -u -r1.42 -r1.43
--- openacs-4/packages/acs-tcl/tcl/acs-permissions-procs.tcl	25 Jun 2018 14:59:07 -0000	1.42
+++ openacs-4/packages/acs-tcl/tcl/acs-permissions-procs.tcl	26 Jun 2018 12:46:47 -0000	1.43
@@ -356,6 +356,11 @@
 
         @see permission::permission_p
     } {
+        # cache is not enabled, exit immediately
+        if {[catch {ns_cache_flush permission_cache NOTHING}]} {
+            return
+        }
+        
         if {[info exists party_id] && [info exists object_id] && [info exists privilege]} {
             #
             # All three attributes are provided