Hi Folks!!!

I have a polling script that polls SNMP counters and keeps adding on the values. The SNMP counter is a 32 bit counter. Now sometimes, when it keeps polling, it gives me an output of NaN as below:

As seen below, after a point, it prints the value as NaN. How can I avoid this? 

 
Tue Mar  4 20:37:58 2014         - Rollover Transferred Till now : 127
+60590224 bytes
Tue Mar  4 20:38:09 2014         - MetInStart = 16348693
Tue Mar  4 20:56:12 2014         - Rollover Transferred Till now : NaN
+ bytes
Tue Mar  4 20:56:22 2014         -* ACStart= 5605524
Tue Mar  4 20:59:36 2014         - Rollover AC Transferred Till now : 
+17039208827 bytes
Tue Mar  4 20:59:46 2014         - MetInStart = 12418066
Tue Mar  4 21:17:56 2014         - Rollover Transferred Till now : NaN
+ bytes
Tue Mar  4 21:18:06 2014         -* ACDecryptStart = 8065104
Tue Mar  4 21:21:19 2014         - Rollover AC Transferred Till now : 
+21321758057 bytes
Tue Mar  4 21:21:29 2014         - MetInStart = 29525422
Tue Mar  4 21:39:39 2014         - Rollover - Transferred Till now : N
+aN bytes

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In reply to NaN output by spikeinc

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