Can't trigger on a negative number

[noxis]

Hi! For the last couple of years I have had my scripts report various minus numbers to signify different failure conditions. This was to stop an item going Unsupported when something failed or timeout. Instead I can trigger a useful message saying what had failed.

However in the latest version 1.8.3 I just finished a very shiny MySQL monitoring script that returns -1 or -2 depending on what goes wrong and I got met with this error when attempting to create the trigger in the GUI:

Not allowed symbols or sequence of symbols in expression element detected: Check expression part starting from ' =-2 '

Here is my expression:

{t_MySQL_Slave:system.run[/usr/local/bin/zabmysqlstats.pl --slave-status].last(0)}=-2

[Vedmak]

This will be fixed in 1.8.4.

https://support.zabbix.com/browse/ZBX-2890