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Support Article

Spin-off of a new case fails with the Flow_NullWorkPage error



A case type with three stages is created. When calling a case after skipping the first stage, the case is created correctly. However, on skipping two stages, an error is displayed in the third stage.

Error Messages

The Flow_NullWorkPage error displays in the Tracer.

Steps to Reproduce

  1. Log in to the application
  2. Create a case that spins off a different case type with three stages
  3. Call a case by skipping the first stage of the created case type. The case is created correctly
  4. Call a case by skipping two stages. Error is displayed in the third stage

Root Cause

A defect in Pegasystems’ code or rules. The pxIsAttachmentOfCategoryInCase function removed the work page. The third stage has an attachment requirement row and no attachment categories were selected. Since the row was present, the pxIsAttachmentOfCategoryInCase function was invoked to validate entry to the stage.


Perform the following local-change:
  1. Delete the attachment requirement row in the third stage
  2. Apply HFix-41891

Suggest Edit

Published July 23, 2018 - Updated October 8, 2020

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