Hi there, when I use "LogFormat: rrdtool" in mrtg (2.16.2) and set RRDRowCount30m[_]: 800 I get the error ERROR: CFG Error Unknown Option "rrdrowcount30m" on line 17 or above. The same with RRDRowCount2h and RRDRowCount1d. RRDRowCount (the 5min Avg.) produces no error. Is this a bug or am I doing something wrong. Stefan