Jon Heugh wrote:

>     I am using the cfgmaker to make my mrtg.cfg files and mrtg is making my
> rrd data files. when I try to retrieve the ds0:LAST values in rrdtool is
> returns the Error "the RRD does not contain an RRA matching the chosen CF" .

And it is right.  There is a difference between the CF "LAST" and the
function used in (G)PRINT.  MRTG generated RRD files don't contain RRAs
other than MAX and AVERAGE.  If you need MIN and/or LAST, you need to
create the database yourself.

To print the last seen value (using GPRINT) you don't need a special CF.

cheers,
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