Fatal error: Uncaught Error: Call to undefined method Mage_Catalog_Model_Product_Type_Simple::getUsedProductCollection() in /var/www/magento/app/code/community/Ewave/Pdfwishlist/Block/Page.php:53 Stack trace: #0 /var/www/magento/app/code/community/Ewave/Pdfwishlist/Block/Page.php(28): Ewave_Pdfwishlist_Block_Page->getSimpleProducts() #1 /var/www/magento/app/code/community/Ewave/Pdfwishlist/Block/Page.php(88): Ewave_Pdfwishlist_Block_Page->getProduct() #2 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(923): Ewave_Pdfwishlist_Block_Page->_toHtml() #3 /var/www/magento/app/code/community/Ewave/Pdfwishlist/Model/CreatePdf.php(228): Mage_Core_Block_Abstract->toHtml() #4 /var/www/magento/app/code/community/Ewave/Pdfwishlist/Model/CreatePdf.php(50): Ewave_Pdfwishlist_Model_CreatePdf->_printPage('20839', NULL) #5 /var/www/magento/app/code/community/Ewave/Pdfwishlist/controllers/PdfController.php(10): Ewave_Pdfwishlist_Model_CreatePdf->printPdf(false) #6 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Action in /var/www/magento/app/code/community/Ewave/Pdfwishlist/Block/Page.php on line 53