Not generating all links in site

[info1465]

I have generated my xml site map for my site.But is not generating all [ External links are visible to forum administrators only ] is having more than 15000 links but it is generating only 52 links.
And now it showing a error that Content Coding Error.

[XML-Sitemaps Support]

Hello,

could you please PM me your generator URL and an example URL that is not included in sitemap and how it can be reached starting from homepage?