please help for cacti 1.1.6 rrd nan

[yuga]

Hi all
Regret about my poor english,I have a problem about Graphs
it's same device,but I create for test.
One in Graphs have data,but the other one get nan

filename = "test_traffic_in_283.rrd"
ds[traffic_in].index = 0
ds[traffic_in].type = "COUNTER"
ds[traffic_in].minimal_heartbeat = 120
ds[traffic_in].min = 0.0000000000e+00
ds[traffic_in].max = 1.0000000000e+09
ds[traffic_in].last_ds = "2942459046"
ds[traffic_in].value = NaN
ds[traffic_in].unknown_sec = 122
ds[traffic_out].index = 1
ds[traffic_out].type = "COUNTER"
ds[traffic_out].minimal_heartbeat = 120
ds[traffic_out].min = 0.0000000000e+00
ds[traffic_out].max = 1.0000000000e+09
ds[traffic_out].last_ds = "1105942829"
ds[traffic_out].value = NaN
ds[traffic_out].unknown_sec = 122

filename = "core_3560_traffic_in_7.rrd"
ds[traffic_in].index = 0
ds[traffic_in].type = "COUNTER"
ds[traffic_in].minimal_heartbeat = 600
ds[traffic_in].min = 0.0000000000e+00
ds[traffic_in].max = 1.0000000000e+09
ds[traffic_in].last_ds = "2942898355"
ds[traffic_in].value = 1.0977435000e+05
ds[traffic_in].unknown_sec = 0
ds[traffic_out].index = 1
ds[traffic_out].type = "COUNTER"
ds[traffic_out].minimal_heartbeat = 600
ds[traffic_out].min = 0.0000000000e+00
ds[traffic_out].max = 1.0000000000e+09
ds[traffic_out].last_ds = "1105971773"
ds[traffic_out].value = 9.8080416667e+03
ds[traffic_out].unknown_sec = 0

How to fix about test_traffic_in_283.rrd -->ds[traffic_in].value = NaN
and it's same device but minimal_heartbeat are different for why....

[Osiris]

Your rrd file max value is too low.