Error with PivotTable?

Hi,

I know this is a little vague but to be honest the message is even more so. I've pulled in data from an OData Feed and have ticked the Date field to add it into my PT. The problem occurs whenever I click the little arrow to filter this data, as it comes up with this:

http://cubeupload.com/im/94PV9c.png

And thats all I get, no error logs in Event Viewer, no message in Excel just this empty error? Has anyone ever seen this when attempting to filter on certain fields, if so did you manage to realise what was wrong on your table?

I can't really offer more info, as I don't have it.

Thanks for any responses