[Xymon] Graphs not showing

[W.J.M. Nelis]

Hello Scot,

> Are you sure data is making it into the RRD?  Try using rrdtool dump on the rrd and see if you get any data.
It has been verified that the data makes it into the RRD. Moreover, in the 
(test) case that a single graph was generated, two lines were shown, the 
underrun rate and the overrun rate. The statistics shown below the graph 
were all non-NaN.

I still don't understand this problem. The data is there in the RRD's, the 
databases are in the correct place, they are accessible and 'rrdtool dump` 
shows their content without error messages. If only one in stead of all 
graphs is requested, the requested graph is shown.

Thanks,
   Wim Nelis.