diff --git a/bhl.inc.php b/bhl.inc.php
index 82c8893..a28e61c 100644
--- a/bhl.inc.php
+++ b/bhl.inc.php
@@ -160,7 +160,7 @@ function bhl_proj()
 
 function _bhl_make_abs_path($proj_file, $path)
 {
-  if($path[0] == '.')
+  if($path && $path[0] == '.')
     return dirname($proj_file) . '/' . $path;
   else
     return $path;
@@ -215,7 +215,7 @@ function bhl_run($debug = true, $force = false, $exit_on_err = true)
 
     if($ret_var != 0)
     {
-      bhl_handle_error_result($ret_out, $err_file, $exit_on_err);
+      bhl_handle_error_result($ret_out, bhl_proj()->error_file, $exit_on_err);
       if(!$exit_on_err)
         return false;
     }