How To Fix /INCMD/MSG278 - Predecessor valid-from date only allowed for the first relation of chain

/INCMD/MSG278 - Overview

• Message type: E = Error

• Message class: /INCMD/MSG -

• Message number: 278

• Message text: Predecessor valid-from date only allowed for the first relation of chain

Self-Explanatory Message

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/INCMD/MSG278 - Details

• The SAP error message /INCMD/MSG278 indicates that there is an issue with the configuration of predecessor relationships in a chain. Specifically, it states that the "valid-from date" for a predecessor is only allowed for the first relation of the chain. This typically occurs in the context of Integrated Planning or similar scenarios where you are defining dependencies between different planning objects.
  
  Cause:
  The error is caused by attempting to set a valid-from date for a predecessor relationship that is not the first in the chain. In SAP, the valid-from date is used to define when a particular relationship or dependency becomes effective. However, the system restricts this setting to only the first predecessor in a chain to maintain data integrity and avoid confusion in the planning process.
  
  Solution:
  To resolve this error, you should:
  
  
  Check the Predecessor Relationships: Review the chain of predecessors you have defined. Ensure that only the first predecessor in the chain