Cacti rrd No such file or directory

[Number]

Hello everybody..

I'm new to cacti, i have installed snmp and i have all my graph good (Apache,mem,cpu,process,....)

I would like to install Mailgraph, but i can..
I use this mailgraph script and howto :
http://forums.cacti.net/download.php?id=1820

I have do everything in the text file :

1. cp ./Mailgraph/mailgraph /usr/sbin/mailgraph

2. cp mailgraph /usr/sbin/mailgraph

3. cp mailgraph_init /etc/rc.d/init.d/mailgraph

4. chkconfig --add mailgraph

5. cp ./cacti_cron /etc/cron.d/cacti

6. service crond restart

7. Add mailgraph_snmpd.conf to /etc/snmp/snmpd.conf

8. service snmpd restart

9. Add cacti_graph_template_postfix_stats.xml to Cacti

mailgraph.pl is on /var/www/cacti/scripts/
init work perfectly..

I have some data in /var/tmp/mail*

But when i try to see my graph i see this error :

ERROR: opening '/var/www/cacti/rra/localhost_send_26.rrd': No such file or directory

Who create this file ? and when ?


Sorry for the beginner question, i have search on the forum but i don't find anything..

Thanks

[Number]

I have 13 graph on my installation :
8 from ws_apache stats
Proc
Mem
Disk space
Logged user

All work perfectly, i have one rdd file for eatch graph..
But i can't add Mailgraph, always the same error message..

How can i debug that ?
They have nothing on the log...

Thanks

[Number]

Someone to help me ?

I have try everything on the mailgraph subject...
I have snmp running, i have files on /var/tmp/ (mailgraph work !! )

I import a template and the rrd file was never créated.. why ?

[gandalf]

Please use 2nd link of my sig for debugging. And please ask on the Scripts and Templates forum as a post to the original thread
Reinhard