Warning: gzwrite(): not a valid stream resource

Warning: gzopen(/home/domain/public_html/vbforum/vbseo_sitemap/data/sitemap_1.xml.gz) [function.gzopen]: failed to open stream: Permission denied in /home/domain/public_html/vbforum/vbseo_sitemap/vbseo_sitemap_functions.php on line 579

Warning: gzopen(/home/domain/public_html/vbforum/vbseo_sitemap/data/urllist.txt.gz) [function.gzopen]: failed to open stream: Permission denied in /home/domain/public_html/vbforum/vbseo_sitemap/vbseo_sitemap_functions.php on line 583

When running the generator I get a ton of errors starting with

Warning

: gzwrite(): supplied argument is not a valid stream resource in /home/domain/public_html/vbforum/vbseo_sitemap/vbseo_sitemap_functions.php on line 593

Warning: gzwrite(): supplied argument is not a valid stream resource in /home/domain/public_html/vbforum/vbseo_sitemap/vbseo_sitemap_functions.php on line 604

Warning: gzwrite(): supplied argument is not a valid stream resource in /home/domain/public_html/vbforum/vbseo_sitemap/vbseo_sitemap_functions.php on line 607

the map runs and generates an entry in the log but when I click it I get

You don't have permission to access /vbforum/vbseo_sitemap/data/sitemap_index.xml.gz on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Hello,

Make sure that you have set 0777 permissions to vbseo_sitemap/data/ folder.

Yes I confirmed that after searching here

By the way any search conducted on your forum with an error number in it results in 497 + results - and NONE of them really contain that number - at least not the first few pages

We just moved the domain to a new centos 5 php 5 server - although I cant be sure this wasnt happening on old server

If you have any files inside data/ folder, set their permissions to 0666 as well.

By the way any search conducted on your forum with an error number in it results in 497 + results - and NONE of them really contain that number - at least not the first few pages

That number is excluded from the search, that's why you can't find it.

they were all 777

Just changed them to 666

still same problem

Please open a support ticket with FTP access for troubleshooting.