Cacti

Oups oups, find the answer to the problem looking at the source code. I did not configure the right version of rrdtool in my settings. Putting it back to version 1.2 solves the problem.

Sorry ...

I've got exactly the same problem using rrdtool 1.2. Here is the rrdtool command to generate the previews : /usr/local/rrdtool/bin/rrdtool graph - --imgformat=PNG --start=1124915153 --end=1125001553 --title="Cisco 6513 - CPU Usage" --rigid --base=1000 --height=100 --width=300 --alt-autosca...