Substraction on triggers

[riffe]

Hi, may I ask what is the correct trigger expression for two items like Disk total size and Disk space used. (to trigger if less than 1GB)

I'm using this expression:

({server1:drvCTotal.last(0)}-{server1:drvCUsed.last(0)})<1G


The error is:

Incorrect trigger expression '(0-0)<1G'

Hopin' anyone can help. TIA!

[Alexei]

Please, try either

({server1:drvCTotal.last(0)})-({server1:drvCUsed.last(0)})<1G

or

{server1:drvCTotal.last(0)}-{server1:drvCUsed.last(0)}<1G

I believe it should work.

[riffe]

Hi Alexei, both of them don't work and still the same error.

[riffe]

hi guys, any idea on this. tnx

[eric.butler]

Workaround

I had the same problem. What I did was use a plus just to get the frontend to accept the trigger, then go into the database and edit the + to be a -.

I believe there was a post a while back about this bug in the regular expression checking code for the triggers, but I don't know if this issue is related.