Hi,

I am trying to use eval block in one of the rules and am a bit confused about it. The rule is something like this:

rule "LastCapacity"
when
    e: Execution(lastCapacity:lastCapacity,parentOid:parentOid)
    eo: ExecutionOrder(entityOid:entityOid,msgType:msgType,execType:execType)
    eval(lastCapacity != null && entityOid == parentOid && msgType == "8")
then

..................
end

where Execution and ExecutionOrder are 2 objects that are linked by an ID. I expect eval to return true for certain sets of objects that I send. But, the above rule exits without running the consequence. On the other hand, when I write the rule as:

rule "LastCapacity"
when
e: Execution(lastCapacity:lastCapacity==null,parentOid:parentOid)
eo: ExecutionOrder(entityOid:entityOid == parentOid, msgType == "8")
then

.............................
end

the rule triggers the consequence for same set of objects. I thought that if the expression in eval block comes out to be true, the consequence will be triggered. Am I missing something obvious here?

Thanks

Malay Shah

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