[rules-users] eval in lhs

[HonorGod]

Can i have the following as one of my conditions in decision table ?

eval(convertYesOrNo("$param").equals(myObject.getFlag()))

where convertYesOrNo() is a function inside decision table.

I get the following error - 



Exception e org.drools.RuntimeDroolsException: Exception executing predicate
com.barcap.efg.fine.drools.dataobject.Rule_Corporate_Action_12_0Predicate0Invoker at 490d7410
org.drools.RuntimeDroolsException: Exception executing predicate
com.barcap.efg.fine.drools.dataobject.Rule_Corporate_Action_12_0Predicate0Invoker at 490d7410
	at
org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:279)
	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:143)
	at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:360)
	at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:344)
	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:185)
	at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:146)
	at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1046)
	at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1001)
	at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788)
	at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:216)
	at 

Thanks.
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