Custom Post Sitemap Error

I am having custom posts in my site, and woocommerce as well. Sitemap is not generating the sitemap, for normal wordpress posts and categories , it works well.

I get following message in xml
XML Parsing Error: no element found
Location: http://www.becauseiamfabulous.com/sitemap-pt-product-2014-07.xml
Line Number 1, Column 1:

https://wordpress.org/plugins/google-sitemap-generator/