SAP Knowledge Base Article - Public

2904833 - Unable to change a Project Task Assignment


You are trying to change a project task assignment between Project ABC to Project DEF but the selected task always goes back to project ABC.


You may get error 'All expense items are ignored because they cannot be reassigned'


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Reproducing the Issue

  1. Work center Project Management.
  2. Select "Not Invoiced Time and Expense".
  3. Search the project ABC.
  4. Select any project task line and click "Change Project task Assignment".
  5. In the newly open window, select the project DEF and click "Save"

In the next 10min, the selected Project task status will remain as "Marked for Reassignment".

After this delay, the project task selected is automatically reassigned to the original project (ABC) under the Reassignment Status: "Finished with error".

When clicking on the error icon, we can find this error message:

"Diff. billable quantity prohibits posting to a non-billable project DEF"


This kind of reassignment from “Billable Project” to a “Non-billable Project” is typically not used by customers.

Reassignment of Project Task Confirmations functionality is mostly used to transfer time from “Non-billable Project” to a “Billable Project” or from one “Billable Project” to another “Billable Project”.

Since source project “ABC” is a billable project and the field “Billable Hours” is modified by you, the reassignment to a non-billable project is not possible.


You are advised to manually clear off the field “Billable Hours” and change the project task manually to “DEF” from Time Administrator screen.


Change Project task Assignment, Billable Hours, Billable Project, Non-billable Project, Diff. billable quantity prohibits posting to a non-billable project. , KBA , AP-TIM-TIM , Employee Time , AP-PRO , Project Processing , How To


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