No data available. Please check back soon

[info298]

Hi,
Sitemap stats
Total URLs: 178,340
No data available. Please check back soon

In google webmaster tools. Any idea why google says no data available? I have 178k url's in 5 sitemap's files.

Did a little re-search on this and can't find an answer.

[XML-Sitemaps Support]

Hello,

perhaps Google has not yet maintained the index for your site and is crawling it now.