RRDTool Says: Error

[nsbelgium1]

Hello

I try to create graphs for a server (the SNMP is not configured for this server)
The graphs are created through a script that returns data to cacti.
That is the definition of my device: (cf. screenshot1)

when I want to create a graph, it works but the graph does not start. In debug mode via: 'Turn On Graph Debug Mode. " he gives me as error
'ERROR: opening' / usr/local/cacti/rra/dc2test_dtotal_929.rrd ': No such file or directory'

When I run debug cacti and cacti I analyze the file /logs/cacti.log, it seems that the poller does not check the equipment because my script did not appear with his output ....


Anyone have a solution, a runway?


Because when I do the same manipulation with a graph to a server where the SNMP is enabled, it works ...

Is it mandatory snmp? to make graph in cacti?


Thank you in advance...


NB: chart for the bandwidths of switch with snmp work very well so cacti works




edit:
I just find this in the parameters of the poller. (Cf. screenshot2)

If I understand correctly, we need the snmp is available on equipment for the poller recognize?