diff --git a/addons/web/static/src/js/views/pivot_view.js b/addons/web/static/src/js/views/pivot_view.js
index c874a87665f..40b18fff86c 100644
--- a/addons/web/static/src/js/views/pivot_view.js
+++ b/addons/web/static/src/js/views/pivot_view.js
@@ -803,7 +803,7 @@ var PivotView = View.extend({
         framework.blockUI();
         var nbr_measures = this.active_measures.length,
             headers = this.compute_headers(),
-            measure_row = nbr_measures > 1 ? _.last(headers) : [],
+            measure_row = nbr_measures >= 1 ? _.last(headers) : [],
             rows = this.compute_rows(),
             i, j, value;
         headers[0].splice(0,1);
@@ -829,7 +829,8 @@ var PivotView = View.extend({
             title: this.title,
         };
         if(table.measure_row.length + 1 > 256) {
-            c.show_message(_t("For Excel compatibility, data cannot be exported if there are more than 256 columns.\n\nTip: try to flip axis, filter further or reduce the number of measures."));
+            crash_manager.show_message(_t("For Excel compatibility, data cannot be exported if there are more than 256 columns.\n\nTip: try to flip axis, filter further or reduce the number of measures."));
+            framework.unblockUI();
             return;
         }
         session.get_file({