rrd created updated with each poller but partial U error

[neerajkappa]

this is my rrd output kindly help in this

rrdtool info begun_new_qtbytesout_454.rrd | grep ds
ds[qtBytesOut].index = 0
ds[qtBytesOut].type = "COUNTER"
ds[qtBytesOut].minimal_heartbeat = 600
ds[qtBytesOut].min = 0.0000000000e+00
ds[qtBytesOut].max = 2.0000000000e+06
ds[qtBytesOut].last_ds = "U"
ds[qtBytesOut].value = NaN
ds[qtBytesOut].unknown_sec = 4
ds[qtBytesIn].index = 1
ds[qtBytesIn].type = "COUNTER"
ds[qtBytesIn].minimal_heartbeat = 600
ds[qtBytesIn].min = 0.0000000000e+00
ds[qtBytesIn].max = 2.0000000000e+06
ds[qtBytesIn].last_ds = "U"
ds[qtBytesIn].value = NaN
ds[qtBytesIn].unknown_sec = 4

[Osiris]

Not much to say. You have an rrdfile with no updates. Have you followed the install instructions? What is in your cacti.log?