Incorrect Trigger Expression

[Spencer]

Hello,

I'm new to Zabbix and although I've been picking it up well (and the forums have helped a lot), I'm having a problem with something that I'm not sure is a syntax problem...but I need to ask.

I'm creating a trigger for an item that monitors the Windows Event Log for an Application Error. Here is my trigger that works:

{testhost:eventlog[Application,,Error,,1000].logseverity(0)}=4

My problem is, as many have discussed before, that the trigger for the occurrence of an event doesn't clear from the dashboard, so I found advice that suggests something like this:

{testhost:eventlog[Application,,Error,,1000].logseverity(0)}=4 & 
{testhost:eventlog[Application,,Error,,1000].nodata(1800)}#1

That does work. When I press Update, I get the following error:

Incorrect trigger expression. Check expression part starting from " & {testhost:eventlog[Application,,Error,,1000].nodata(1800)}#1".

For fun, I changed the & to the word "and" like this:

{testhost:eventlog[Application,,Error,,1000].logseverity(0)}=4 and {testhost:eventlog[Application,,Error,,1000].nodata(1800)}#1

...and got this error:

Incorrect trigger expression. Check expression part starting from "}#1".

This almost makes me think that my Zabbix installation is not liking the trigger operators (the & or the #), but I'm a rookie. I could be WAY off on my trigger expression.

Thanks in advance!

[harmonica]

Hi,

https://www.zabbix.com/documentation/2.4/manual/introduction/whatsnew240

5.5 Support of new trigger operators

{testhost:eventlog[Application,,Error,,1000].logseverity(0)}=4 and
{testhost:eventlog[Application,,Error,,1000].nodata(1800)}<>1