diff --git a/bhl.inc.php b/bhl.inc.php
index d8de72a..c67b661 100644
--- a/bhl.inc.php
+++ b/bhl.inc.php
@@ -128,7 +128,7 @@ function bhl_handle_error_result(array $ret_out, $err_file, $exit = true)
 {
   if(!is_file($err_file))
   {
-    stderr("Something went wrong: " . (is_array($ret_out) ? implode("\n", $ret_out) : "????"));
+    stderr("Something went wrong: " . implode("\n", $ret_out));
     if($exit)
       exit(1);
   }
diff --git a/bhl_flt.inc.php b/bhl_flt.inc.php
index 3b73d4a..269e9a7 100644
--- a/bhl_flt.inc.php
+++ b/bhl_flt.inc.php
@@ -2,7 +2,7 @@
 namespace metagen_php;
 use Exception;
 
-function flt_bhl_ref($val, $name, $struct, $args)
+function flt_bhl_ref($val, $name, $struct, $str_args)
 {
   if(!$val)
     return $val;
@@ -17,11 +17,9 @@ function flt_bhl_ref($val, $name, $struct, $args)
   if(!isset($val['fn']))
     throw new Exception("Missing 'fn'");
 
-  $signature = explode(",", $args);
-  if(!$signature)
-    throw new Exception("Invalid signature: $args");
+  $args = explode(",", $str_args);
 
-  \taskman\bhl_validate_func_ref($module_file, $val['fn'], $signature);
+  \taskman\bhl_validate_func_ref($module_file, $val['fn'], $args);
 
   return $val;
 }