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Replace a resource via Task Assignments View returns an error 'ERROR: Action is not supported for Milestone or Summary Tasks'


Article ID: 19779


Updated On:


Clarity PPM SaaS Clarity PPM On Premise



When doing a Replace on the Task tab, Assignment view occasionally you will get the following error: "ERROR: Action is not supported for Milestone or Summary Tasks"

Steps to Reproduce:

  1. Create a project
  2. Add a few resources to the team
  3. Create a regular task (not a Milestone nor a Summary task)
  4. Assign one of the resources to the task
  5. Navigate to the Task, Assignments view
  6. Select the resource and click 'Replace' button
  7. Select another resource and click 'Replace' button

Expected Result: The new resource to be on the assignment
Actual Result: You may get " ERROR: Action is not supported for Milestone or Summary Tasks"


Caused by CLRT-72307 


Our sustaining team reviewed this issue. There are no current plans to make any changes to this area of the product.



Make the replacement via the Task Properties page.

Additional Information:


Reference CA PPM Customer Defect Resolution Policy 



Release: ESPCLA99000-14.2-Clarity-Extended Support Plus