Can not create trigger through API, Invalid parameter \"/1/expression\"

[Pavel382]

Hello.

Zabbix server version: 5.0.17

I'm trying to create a trigger through API, I put

last(/test-host/net.tcp.listen[443])=0

in "expression" variable, but I always get
Invalid parameter "/1/expression": incorrect trigger expression starting from "last(/test-host/net.tcp.listen[443])=0

The same error is given if I try to put this string in "expression" field through web interface.
Even direct copy-paste from example for expression

last(/Zabbix server/system.cpu.load[all,avg1])>5

gives the same error.


Please help

[ISiroshtan]

Hi there mate.

In Zabbix 5.4 they changed syntax of trigger expressions. And you trying to feed 5.4 Syntax to 5.0 Zabbix.

The syntax you need to use is along the lines of:

{hostname:item.key.last()}=0

So for your case something like:

{test-host:net.tcp.listen[443].last()}=0

Hope it helps!

[Pavel382]

I feel so stupid.
I even tried to put expression as you suggest because it is constructed in the same way in web interface, but I've made a typo.

Thank you very much, it worked!