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WrongModeException on To.pxResults when using OOTB Reply



WrongModeException is generated in the logs when using the out-of-the-box email Reply as To.pxResults on the email interface on the case. This occurs when the Tracer is enabled while clicking Reply. Hence, user is unable to send the reply.

Error Messages

Exception The property To.pxResults was of mode Page List while was expecting Java Object mode.  Details: (none)
    at ~[prprivate-data.jar:?]
    at ~[prpublic.jar:?]
    at com.pega.pegarules.monitor.internal.tracer.TracerSessionImpl.traceAutomation( ~[prprivate-monitor.jar:?]
    at com.pega.pegarules.monitor.internal.tracer.TracerSessionImpl.traceAutomationInputs( ~[prprivate-monitor.jar:?]
    at com.pega.pegarules.session.internal.mgmt.Executable.automationProlog( ~[prprivate-session.jar:?]
    at com.pega.platform.coreassemblers.automation.AbstractAutomation.main( ~[prpublic.jar:?]
    at com.pega.platform.coreassemblers.automation.AbstractAutomation.main( ~[prpublic.jar:?]
    at com.pega.platform.executionengine.vtable.containers.internal.SingletonRuleContainer.invoke( ~[execution-engine.jar:?]
    at com.pega.platform.executionengine.vtable.internal.RuleDispatcherImpl.invoke( ~[execution-engine.jar:?]
    at com.pega.platform.executionengine.vtable.internal.RuleDispatcherImpl.invoke( ~[execution-engine.jar:?]
    at com.pega.pegarules.session.internal.mgmt.Executable.doAutomation( ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.mgmt.Executable.invokeAutomation( ~[prprivate-session.jar:?]

Steps to Reproduce

  1. Upgrade to Pega Platform 8.3.
  2. Load a Case from an inbound email.
  3. Reply on the same email using To.pxResults from the Clipboard.

Root Cause

A defect in Pegasystems’ code or rules.


This feature is implemented in Pega Platform 8.4.

Published December 2, 2021

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