MRTG graphs

[Christophe Truffier]

Hello,

Following this page: http://hobbitmon.sourceforge.net/docs/hobbit-mrtg.html
I added MRTG graph to my hobbit server, but when I look to trends page I 
didn't see anything.
The RRD file is clearly updated but when I want to see image of the 
graph hobbitgraph.sh say:
The image 
“http://hobbit/hobbit-cgi/hobbitgraph.sh?host=master&service=mrtg&graph_width=576&graph_height=120&first=1&count=1&disp=master&graph=hourly&action=view” 
cannot be displayed, because it contains errors.

I've search but found nothing to explain why I've this error.

Any idea ?
Thanks

-- 
Christophe Truffier
Pack-Solutions