"An error occured" when trying to generate a sitemap.

[Jukey]

I am trying to generate a sitemap for [external links are visible to admins only], and I keep getting this error.  I thought it might be something with my website, so I cleared out the index.php and .htaccess files...the result was the same.  Why does it not work?  I tried another sitemap generator website and it worked fine.

[XML-Sitemaps Support]

Hello,

please contact your host to check that requests to your site sent from our IPs are NOT blocked:
85.92.84.232  - 85.92.84.237

[Jukey]

That was the problem.  They said that one of those IP addresses had over 70 connections at one time...so somebody either manually blocked it, or something was triggered to automatically block.  They unblocked the range of IP addresses and now it works.  Thanks for the help.