Google Sitemap no data

[Runner]

In the last week or so I am getting this message in Google Webmaster Tools | Sitemap:

Indexed URLs in Sitemap No data available. Please check back soon.

Has anyone else seen this before and any idea what is going on?

[leehack]

I'd put the error message into a Google search to find out personally, almost certain to be explained somewhere with an answer readily available.

[jont]

Keith - did you find a cause / solution for this? Would be good to post for others if they experience the same.

[Runner]

Never really got an answer on this. I also posted on Google webmasters forum. The only reply I got was 'this is a temporary error, the data is there but cannot be displayed for some reason.'

The error was eventually corrected