diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
old mode 100644
new mode 100755
index bd7497f857..d4dd05d8c8
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -936,7 +936,7 @@ def process_info(self, info_dict):
                         with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8') as subfile:
                                 subfile.write(sub)
                 except (OSError, IOError):
-                    self.report_error('Cannot write subtitles file ' + descfn)
+                    self.report_error('Cannot write subtitles file ' + sub_filename)
                     return
 
         if self.params.get('writeinfojson', False):