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UnresolvedAssemblyError: Invalid expression or reference



Smart Investigate For Payments 7.11 is setup on Pega Platform 7.2.
Error occurs while saving the .ChargeAmountBaseCurr Declare Expression which is an out-of-the-box rule. Hence, unable to create child cases.

Error Messages Invalid expression or reference: No candidates found [possible function name, ruleset/version or number of parameter problem]
    at com.pega.pegarules.priv.FUAUtil.throwUnresolvedAssemblyError(
    at com.pegarules.generated.expressions.ra_action__chargeamountbasecurr__461a2d9f3da06257c1727ac309efeac8.perform(
    at com.pega.pegarules.session.internal.mgmt.Executable.doAction(
    at com.pega.pegarules.exec.internal.declare.infengine.ChainingEngineUtilImpl.runActivity(
    at com.pega.pegarules.exec.internal.declare.infengine.ChainingEngineUtilImpl.executeBackwardChainingRule(
    at com.pega.pegarules.exec.internal.declare.infengine.ChainingEngine.deriveGoalValue(
    at com.pega.pegarules.exec.internal.declare.infengine.ChainingEngine.forceFeedDeriveGoalValue(
    at com.pega.pegarules.exec.internal.declare.infengine.InferenceEngineImpl.seekGoalValue(

Steps to Reproduce

  1. Create an Investigation case.
  2. Create a child case.
  3. Open the ChargeAmountBaseCurr rule.
  4. Save the rule. Invaild expression error occurs.

Root Cause

A defect in Pegasystems’ code or rules.
Error occurs when the rule is saved. However, when the quotes are removed in the If condition, the user can save the rule.


Apply HFix-60964.

Published April 14, 2020 - Updated December 2, 2021

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