delta - lastvalue IS NULL for function

[bizonek]

Hi All

I have try to monitoring my Cisco switch by SNMPv2 and have error in zabbix_server.log:


2963:20091006:140015 Expression [{12589}>150000] for item [22515][Cisco:ifInOctets35] cannot be evaluated: unable to get function value: lastvalue IS NULL for function [12589][Cisco:ifInOctets35.delta(0)]

This problem is with DELTA function ??

[bizonek]

I know a reason. In SNMPv1,2 all triggers are set as "ifInOctets.delta(0) }>150000" i have set delta as 1 are all is ok