I am getting an error with AW Blog when generating Google sitemaps from my Magento 1.9.2.4 website. The error is as follows Fatal error: Call to a member function streamWrite() on a non-object in /app/code/community/AW/Blog/Model/Sitemap.php on line 129 I searched online but never found a solution to the problem.
Most likely it happens due missing write permissions for target folder. Go to your Google Sitemap in Magento admin, check your sitemap paths and make sure they are writeable