Hi Henrik, I tried to update my hobbitd_rrd to the current snapshot version, and I got loads of "Duplicate DS name: lambda" when using split-ncv. I found the error lies here : --- do_ncv.c.old 2007-09-11 15:00:20.000000000 +0200 +++ do_ncv.c 2007-11-26 16:36:43.000000000 +0100 @@ -177,7 +177,7 @@ } } - if (split_ncv && (paridx > 1)) { + if (split_ncv && (paridx > 0)) { create_and_update_rrd(hostname, testname, params, NULL); /* We've created one RRD, so reset the * params for the next one */ With this modification, it works. Thanks for your great software ! I hope 4.3 will be out soon ! -- Charles Goyard - charles.goyard at orange-ftgroup.com - (+33) 1 45 38 01 31 Orange Business Services - online multimedia // ingénierie