diff -r 3fa1de896666 -r 0c50aac49e55 src/server.c
--- a/src/server.c	Tue Aug 28 14:16:30 2018 +0200
+++ b/src/server.c	Tue Aug 28 14:37:09 2018 +0200
@@ -74,9 +74,11 @@
         if (pgnfile) {
             int result = read_pgn(pgnfile, &continuegame,
                 &(settings->gameinfo));
+            long position = ftell(pgnfile);
             fclose(pgnfile);
             if (result) {
-                addstr("Invalid PGN file content.\n");
+                printw("Invalid PGN file content at position %ld:\n%s\n",
+                        position, pgn_error_str(result));
                 return 1;
             }
             if (!is_game_running(&continuegame)) {