How To Fix PSB_API_MSGCL134 - Duration cannot be changed if the calculation key is "Calculate Duration"

SAP Error Message - Details

• Message type: E = Error

• Message class: PSB_API_MSGCL -

• Message number: 134

• Message text: Duration cannot be changed if the calculation key is "Calculate Duration"

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PSB_API_MSGCL134 - Duration cannot be changed if the calculation key is "Calculate Duration" ?

  The SAP error message PSB_API_MSGCL134 indicates that there is an issue with changing the duration of a project or task when the calculation key is set to "Calculate Duration." This typically occurs in the context of project management within SAP, particularly when using the Project System (PS) module.
  
  Cause:
  The error arises because the system is configured to automatically calculate the duration based on the start and finish dates of the project or task. When the calculation key is set to "Calculate Duration," the system expects the duration to be derived from these dates, and any manual changes to the duration are not allowed. This is a safeguard to ensure data integrity and consistency in project scheduling.
  
  Solution:
  To resolve this error, you have a couple of options:
  
  
  Change the Calculation Key:
  
  If you need to manually adjust the duration, you can change the calculation key from "Calculate Duration" to a different setting that allows manual