Error Creating a New Trigger

[ThatITGuy944]

I am a newbie at Zabbix and wanted to create an alert trigger for "Free disk space on <drive letter> (percentage)". I go to Monitoring > Latest Data > filter by VMware virtual machine name and click on VMware: Free disk space on C:\ (percentage). I select Create trigger from the options menu and it brings me to this screen:



I click Add and I receive this message:



I am unsure what it's asking or why it's displaying an error. I followed the instructions but still no luck. Any help is appreciated!

[ISiroshtan]

Hey there.
Not sure which instructions did you follow, but I think you would benefit from checking the documentation about trigger expressions and supported functions.

If you still struggle with writing proper expression after making yourself familiar with the two documents above, feel free to describe what kind of alert criteria you want in and someone might help you out with writing it for you as example

[ThatITGuy944]

Ok thank you. I'll check it out and follow your recommendations.

[cyber]

You wanted to create a trigger, but forgot the most important part... entering your own trigger condition...so replace the "func" with your desired function and enjoy..