Write errors with Google XML Sitemap Generator and WordPress

I’ve run into a problem where my Google Sitemap Generator plugin for WordPress keeps generating an error that there’s been a problem and it can’t write to either sitemap.xml or sitemap.xml.gz.

The error I get is:

"There was a problem writing your sitemap file. Make sure the file exists and is writable. Learn more
There was a problem writing your zipped sitemap file. Make sure the file exists and is writable. Learn more"

This seems to have started since I upgraded to Google XML Sitemaps 3.2.6. If I rebuild the sitemap manually, everything works fine, the file is written and I don’t get any errors. But left to it’s own devices, things don’t go so well.

I haven’t really solved the problem, but I believe I’ve managed to work around it. First, I downgraded back to Google XML Sitemaps 3.1.6. Since I have a blog running under IIS, there might be another change to make. If you go to Settings – XML Sitemap, Under the Location of your sitemap file:

I selected Custom Location and then put in the full pathname to the file such as C:\Inetpub\blog directory\wordpress\sitemap.xml

With those changes in place, the plugin seems to be working again. After a post, the sitemap.xml file is updated and I don’t get the write protection error. I’m not sure if it was one change or the other, but it’s fixed and I’m not messing with it.