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NullPointerException on pzGetLockingMode



After upgrading to Pega 7.2.1, the Open Assignment action with .pzInsKey, configured in the actions of the repeating grid, does not work and NullPointerException occurs when opening a work object from a worklist. The grid is configured to list all the child cases that correspond to the parent.

Error Messages

at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(
at com.pega.pegarules.session.internal.mgmt.Executable.invokeActivity(
at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(

Steps to Reproduce

  1. Configure a repeating grid with source as report definition which lists the cases of child work objects for a particular parent.
  2. Configure the Open Assignment action with .pzInsKey as parameter in the actions tab of grid.

Root Cause

A defect in Pegasystems’ code or rules.

During runtime, the object class for a top level case in pxGetTopLevelCoverKeyAndClass cannot be retrieved and hence the pzgetlockingmode activity failed.


Apply HFix-36321 to add a null check for the top level case.

Published October 24, 2017 - Updated October 8, 2020

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