error in packet : inconsistentName

[Krishna Mohan]

Hi,
I'm getting the following error when i execute snmpget for table entry.
Tree looks like this :
rocsystable(1)
|_rocsysentry(1)
      |_rocsysIndex(1)
      |_rocVar1(2)

$snmpget -v 2c -c public 172.16.15.34 .1.3.6.1.4.1.1.1.1.2.0
Error in packet
Reason: inconsistentName (That object can not currently be created)
Failed object: ROCSYS-MIB::rocVar1.0

Can anybody clear this.
Thanks in Advance
Regards
Krishna Mohan