Interface - Traffic graphs not creating for new hosts

[briodan]

I'm having a strange problem.
When I'm adding new hosts i can't get the Interface traffic graphs to generate, but other graphs generate correctly. see attachment screenshot below, the graphs not generated are the ones for the interface Traffic.
The RRD files seem to generate no problem.
Can anyone help shed some light into this?
Thanks

[briodan]

Ok i did a bit more investigating and it looks like the graph is looking for the wrong rrd file.
I turned on debug in one of the graphs and it's looking for
/usr/local/groundwork/apache2/htdocs/cacti/rra/gtar-fw01_traffic_in_353.rrd

but the rrd file that gets created is
/usr/local/groundwork/apache2/htdocs/cacti/rra/gtar-fw01_traffic_in_359.rrd

so i went and edited the datasource to point to the correct rrd file.

but now thegraph debug tells me:
Notice: Undefined index: traffic_out in /usr/local/groundwork/apache2/htdocs/cacti/lib/graph_variables.php on line 464

ERROR: No DS called 'traffic_out' in '/usr/local/groundwork/apache2/htdocs/cacti/rra/gtar-fw01_traffic_in_359.rrd