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Support Article

Unexpected behaviour after long time of inactivity



After long time of inactivity when a data transform is run it is failing to update a clipboard page containing refernce properties,null pointer exception is thrown. 

Error Messages PRRuntimeException
at com.pega.pegarules.session.internal.mgmt.Executable.applyModel(

Caused by:


Steps to Reproduce

  1. Configure button to create a page via data transform or an activity.
  2. Populate reference proprty in that page.
  3. Allow the page to passivate. 
  4. After sometime (passivation time) execute another data transform that will try to update that page.

Root Cause

A defect in Pegasystems’ code for which once reference property is passivated its reference is lost.
Due to this, Null pointer is thrown because existence of the reference is not checked before trying to do operations on it.


Apply HFix-29785 to resolve this issue.


Published November 8, 2016 - Updated October 8, 2020

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