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- PNP4Nagios 0.6.x
- PNP4Nagios 0.4.x
PNP was called with a host in the URL but without a service.
Exmaple:
http://<nagios-server>/pnp4nagios/graph?host=<this-host>
PNP tries to get the first service in the specified perfdata directory.
Maybe the directory var/perfdata/<this-host>/
is empty.