Triiger NET TCP not working

[[email protected]]

Hi everyone, I'm having trouble creating a net.tcp trigger.

I'd like to create a trigger warning me that port 50001 is no longer open on a Windows server.
The element works correctly with the key: net.tcp.service[tcp,,50001]

However, when I try to create the trigger associated with this element with the expression below :
{hostname:net.tcp.service[tcp,,50001].last()}<>1

I get the error :
Details - Unable to add trigger
Parameter “/1/expression” invalid: incorrect expression from “{hostname:net.tcp.service[tcp,,50001].last()}<>1”.

I can't find the right expression, could you give me an idea?

Thanks in advance,
Cédric

[[email protected]]

Version ZABBIX 7

[Brambo]

You have 2 easy options to create a trigger and still manage to do it the diffecult way
easy option 1: Go to trigger and create trigger >
using the add button and select the item and set the condition.
easy option 2:
In your template or host item, click the 3 ... before and choose create trigger. This option is a little bit harder as you have to change func to the correct function you want to do

[[email protected]]

Hello,
Thank you very much Brambo, I was able to solve the problem with the expression below:
find(/hostname/net.tcp.service[tcp,,50001])=0
If the port is closed, an alert is triggered.
Thanks again for your help
Have a nice day,