diff --git a/libs/core/core.assemble_auto_filename.php b/libs/core/core.assemble_auto_filename.php
index 4255c645..c43dee96 100644
--- a/libs/core/core.assemble_auto_filename.php
+++ b/libs/core/core.assemble_auto_filename.php
@@ -18,7 +18,7 @@
 function smarty_core_assemble_auto_filename($params, &$smarty)
 {	
 
-	$_compile_dir_sep =  $this->use_sub_dirs ? DIRECTORY_SEPARATOR : '^';
+	$_compile_dir_sep =  $smarty->use_sub_dirs ? DIRECTORY_SEPARATOR : '^';
 		
     if(@is_dir($params['auto_base'])) {
         $_return = $params['auto_base'] . DIRECTORY_SEPARATOR;
diff --git a/libs/core/core.write_cache_paths_file.php b/libs/core/core.write_cache_paths_file.php
index 85e90de9..eac52274 100644
--- a/libs/core/core.write_cache_paths_file.php
+++ b/libs/core/core.write_cache_paths_file.php
@@ -14,6 +14,9 @@
  
 function smarty_core_write_cache_paths_file($params, &$smarty)
 {
+	if (!isset($smarty->_cache_paths_file)) {
+		return false;
+	}
 	$_compiled_content = function_exists('var_export') ? var_export($smarty->_cache_paths, true) : "unserialize('" . serialize($smarty->_cache_paths) . "')";
 	$_compiled_content = '<?php $this->_cache_paths = ' . $_compiled_content . '; ?>';
 	$_params = array('compile_path' => $smarty->_cache_paths_file, 'compiled_content' => $_compiled_content, 'resource_timestamp' => time());