I was running vBSEO and vBSEO Sitemap Generator on one of my sites and when I would submit the sitemaps to Google, it would say I had errors within my sitemap, though it still index most of it. Does this script not generate them properly?
When the errors be caused due to numerous problems other than because of the software is for creating the links . Are links live and none of them broken?
If Google is indexing your sitemap, all you have is probably just warnings. Tell use what they are. Here's how to see Google Webmaster Tools errors/warnings