Index: openacs-4/packages/acs-content-repository/tcl/revision-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-content-repository/tcl/revision-procs.tcl,v
diff -u -r1.37.2.3 -r1.37.2.4
--- openacs-4/packages/acs-content-repository/tcl/revision-procs.tcl	3 Jul 2020 07:27:29 -0000	1.37.2.3
+++ openacs-4/packages/acs-content-repository/tcl/revision-procs.tcl	28 Oct 2020 15:39:19 -0000	1.37.2.4
@@ -117,7 +117,7 @@
                         ns_set put [ns_conn outputheaders] "Content-Length" 0
                         ns_return 200 text/plain {}
                     } else {
-                        if {[info commands ad_returnfile_background] eq "" || [security::secure_conn_p]} {
+                        if {[namespace which ad_returnfile_background] eq "" || [security::secure_conn_p]} {
                             ns_returnfile 200 $mime_type $filename
                         } else {
                             ad_returnfile_background 200 $mime_type $filename