sitemap generator does not work

i click on Run Sitemap Generator

this is the error i get...

what is the problem?

and http://mydomainname/sitemap_index.xml it says Sitemap file not found








[homepage] [4,664.4Kb mem used] [0s (+0s)]
[SECTION START] forumdisplay [4,664.4Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 20, total threads: 0, pages: 1 [4,664.5Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 2, total threads: 0, pages: 1 [4,669.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 17, total threads: 0, pages: 1 [4,669.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 18, total threads: 4, pages: 1 [4,669.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 19, total threads: 4, pages: 1 [4,669.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 25, total threads: 1, pages: 1 [4,669.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 26, total threads: 2, pages: 1 [4,669.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 27, total threads: 1, pages: 1 [4,669.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 28, total threads: 0, pages: 1 [4,669.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 29, total threads: 0, pages: 1 [4,669.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 30, total threads: 1, pages: 1 [4,669.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 31, total threads: 0, pages: 1 [4,669.4Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 32, total threads: 0, pages: 1 [4,669.6Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 33, total threads: 0, pages: 1 [4,669.7Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 1, total threads: 0, pages: 1 [4,669.9Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 5, total threads: 1, pages: 1 [4,670.1Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 4, total threads: 1, pages: 1 [4,670.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 6, total threads: 0, pages: 1 [4,670.5Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 7, total threads: 0, pages: 1 [4,670.7Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 8, total threads: 1, pages: 1 [4,670.9Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 10, total threads: 0, pages: 1 [4,671.1Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 11, total threads: 1, pages: 1 [4,671.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 12, total threads: 0, pages: 1 [4,671.5Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 13, total threads: 0, pages: 1 [4,671.7Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 14, total threads: 0, pages: 1 [4,672.1Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 15, total threads: 0, pages: 1 [4,672.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 16, total threads: 1, pages: 1 [4,672.8Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 21, total threads: 0, pages: 1 [4,672.9Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 22, total threads: 2, pages: 1 [4,673.4Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 23, total threads: 0, pages: 1 [4,673.6Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 24, total threads: 0, pages: 1 [4,674.0Kb mem used] [0s (+0s)]
[SECTION START] showthread [4,674.3Kb mem used] [0s (+0s)]
Database error

Replied via ticket

fixed thanks