TRIGGER.EXPRESSION failure

[Yello]

Hi,
I'm seeing {TRIGGER.EXPRESSION} fail to resolve in an action I use to track disk usage projections for one of our databases.

The Action message looks like this:

Event Time: {EVENT.DATE} {EVENT.TIME}
Item: {ITEM.NAME}
Trigger: {TRIGGER.NAME}
Trigger Expression: {TRIGGER.EXPRESSION}
Severity: {TRIGGER.SEVERITY}
Disk used: {ITEM.LASTVALUE1}
Disk Available: {ITEM.LASTVALUE2}
Status: {STATUS}

The email delivered looks like this:

Event Time: 2012.04.24 14:20:01
Item: MarkLogic node:forest1:disk-size-sum
Trigger: MarkLogic Cluster:node: forest1 disk usage too high!
Trigger Expression: {TRIGGER.EXPRESSION}
Severity: Warning
Disk used: 81.89 Gb
Disk Available: 228.18 Gb
Status: PROBLEM

The trigger expression which does not resolve looks like this:

(({server:marklogic[node,forest1,disk-size-sum].last(0)}*{$MULT}) > {servers:marklogic.forest-status[forest1,device-space].last(0)})


This looks like there's an issue with {TRIGGER.EXPRESSION}. Am I using it the right way?


Regards,
David