How To Fix /INCMD/MSG029 - Predecessor and successor members in a relation cannot be products

/INCMD/MSG029 - Overview

• Message type: E = Error

• Message class: /INCMD/MSG -

• Message number: 029

• Message text: Predecessor and successor members in a relation cannot be products

Self-Explanatory Message

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/INCMD/MSG029 - Details

• The SAP error message /INCMD/MSG029 indicates that there is an issue with the relationship between predecessor and successor members in a planning or forecasting context, specifically in the Integrated Business Planning (IBP) module. The error states that both the predecessor and successor members in a relation cannot be products. This typically occurs when you are trying to create a relationship between two product members in a way that is not allowed by the system.
  
  Cause:
  
  Incorrect Member Types: The error arises when both the predecessor and successor members are defined as products. In IBP, relationships are typically defined between different types of members (e.g., product to location, product to customer, etc.), but not between two products.
  Model Configuration: The configuration of the planning model may not allow for product-to-product relationships, which is a common restriction in many planning scenarios.
  Data Integrity Issues: There may be issues with the data integrity or the way the