diff --git a/app/views/admin/announcements/export_excel.xlsx.axlsx b/app/views/admin/announcements/export_excel.xlsx.axlsx
index a64c5e9..d2454a2 100644
--- a/app/views/admin/announcements/export_excel.xlsx.axlsx
+++ b/app/views/admin/announcements/export_excel.xlsx.axlsx
@@ -156,7 +156,8 @@ wb.add_worksheet(name: "Annoucement") do |sheet|
     row << t.join(";")
     
     files = anns.bulletin_files.asc(:created_at)
-    t = files.collect{|f|"http://" + request.host_with_port + f.file.url}
+    t = files.collect{|f|("http://" + request.host_with_port + f.file.url rescue nil)}
+    t.delete(nil)
     row << t.join(";")
     t = files.collect{|l|l.description_translations["en"]}
     row << t.join(";")