# Fixes
* [wcml-1858] Fixed a pre PHP 5.4 compatibility issue
* [wcml-1856] Fixed `Notice: Undefined index: switcher_id`
* [wcml-1855] Fixed `Fatal error: Class ‘WPML_File’ not found` when using an old version of WPML
* [wcml-1854] Fixed "Invalid or duplicated SKU" error when saving or updating a product with SKU
* [wcml-1853] Fixed `Fatal error: Call to undefined function WC()` when disabling WooCommerce while WCML is running