Index: openacs-4/packages/news-aggregator/www/opml.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/news-aggregator/www/opml.tcl,v
diff -u -r1.2 -r1.3
--- openacs-4/packages/news-aggregator/www/opml.tcl	20 Jan 2018 23:00:54 -0000	1.2
+++ openacs-4/packages/news-aggregator/www/opml.tcl	18 Jul 2018 17:08:51 -0000	1.3
@@ -7,10 +7,13 @@
     {aggregator_id:naturalnum,notnull}
 }
 
-if { [catch {set opml [news_aggregator::aggregator::as_opml \
-			-aggregator_id $aggregator_id]} errmsg] } {
-    doc_return 200 text/html ""
-} else {
-    doc_return 200 application/xml $opml
+if {[catch {
+    set opml [news_aggregator::aggregator::as_opml \
+                  -aggregator_id $aggregator_id]
+} errmsg]} {
+    ad_return_error "OPML generation error" "OPML generation error: $errmsg"
+    ad_script_abort
 }
+
+ns_return 200 application/xml $opml
 ad_script_abort