[rrd-users] strange problem with rrd files

[Ceylan, Hasan]

I am seeing something very strange with an rrd file. When I issue the
same command on the same rrd file, sometimes I get -1 and sometimes I
get valid numbers. See below for the evidence. Can anybody tell me what
is the problem and how to fix it?

D:\cacti\rra>rrdtool fetch router05_traffic_in_55723.rrd AVERAGE -r 300
                    traffic_out          traffic_in

1239115500: -1.#IND000000e+000 -1.#IND000000e+000
1239115800: -1.#IND000000e+000 -1.#IND000000e+000
1239116100: -1.#IND000000e+000 -1.#IND000000e+000
1239116400: -1.#IND000000e+000 -1.#IND000000e+000
1239116700: -1.#IND000000e+000 -1.#IND000000e+000
1239117000: -1.#IND000000e+000 -1.#IND000000e+000
1239117300: -1.#IND000000e+000 -1.#IND000000e+000
1239117600: -1.#IND000000e+000 -1.#IND000000e+000
1239117900: -1.#IND000000e+000 -1.#IND000000e+000
1239118200: -1.#IND000000e+000 -1.#IND000000e+000
1239118500: -1.#IND000000e+000 -1.#IND000000e+000
1239118800: -1.#IND000000e+000 -1.#IND000000e+000
1239119100: -1.#IND000000e+000 -1.#IND000000e+000
1239119400: -1.#IND000000e+000 -1.#IND000000e+000
1239119700: -1.#IND000000e+000 -1.#IND000000e+000
1239120000: -1.#IND000000e+000 -1.#IND000000e+000
1239120300: -1.#IND000000e+000 -1.#IND000000e+000
1239120600: -1.#IND000000e+000 -1.#IND000000e+000
1239120900: -1.#IND000000e+000 -1.#IND000000e+000
1239121200: -1.#IND000000e+000 -1.#IND000000e+000
1239121500: -1.#IND000000e+000 -1.#IND000000e+000
1239121800: -1.#IND000000e+000 -1.#IND000000e+000
^C^C
D:\cacti\rra>rrdtool fetch router05_traffic_in_55723.rrd AVERAGE -r 300
                    traffic_out          traffic_in

1239115560: 5.3360900931e+006 1.8352776297e+006
1239115620: 5.6644442492e+006 1.8454182236e+006
1239115680: 5.5454118831e+006 1.8079642489e+006
1239115740: 5.3310918114e+006 1.7432692011e+006
1239115800: 5.2722387933e+006 1.9979003781e+006
1239115860: 5.2527654333e+006 1.8255164694e+006
1239115920: 5.2088318739e+006 2.0348146781e+006
1239115980: 5.3336778425e+006 1.8927603547e+006
1239116040: 5.1416843811e+006 1.8027591264e+006
1239116100: 5.2362087336e+006 1.7451677114e+006
1239116160: 5.3099712372e+006 1.8011257181e+006
1239116220: 5.2159035978e+006 1.7200984411e+006
1239116280: 5.2727814058e+006 1.8157638164e+006
1239116340: 5.2087896561e+006 1.8454207286e+006
1239116400: 5.2903699897e+006 1.7795487242e+006
1239116460: 5.2881255581e+006 1.6852976875e+006
1239116520: 5.2728409219e+006 1.7544851006e+006
1239116580: 5.2948659794e+006 1.7675860061e+006
1239116640: 5.7597273936e+006 1.8286949381e+006
1239116700: 5.4630810019e+006 1.7799864414e+006
1239116760: 5.4168736364e+006 1.7804790067e+006
1239116820: 5.8199148192e+006 1.8730386642e+006
^C^C