Graphs show blank periods

[SvenPool]

Hi,

I've been searching and looking in this forum and on Google, but I haven't found anything similar to my problem.

Somehow cacti shows blanks in graphs for a couple of servers. It isn't on all of our servers which I'm monitoring. Mostly our Windows 2008 Servers are showing these blanks between periods. On other servers the graphs are okay and don't show these blanks.

I've got no clue what is going wrong, and what I should and can check to correct this. I was hoping some of you can give me some advice to solve this.

I've attached an example of how the graphs look.

Regards,
Sven

[gandalf]

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