How To Fix PPEACT618 - Relationship is not valid between &1 type &3 and &2 type &4

PPEACT618 - Overview

• Message type: E = Error

• Message class: PPEACT - Messages for iPPE ACT Application (Activities)

• Message number: 618

• Message text: Relationship is not valid between &1 type &3 and &2 type &4

What causes this issue?

The selected relationship does not exist in Customizing.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

PPEACT618 - Details

• The SAP error message PPEACT618 indicates that there is an invalid relationship between two objects in the system. This error typically arises in the context of SAP Production Planning and Detailed Scheduling (PP/DS) or similar modules where relationships between different types of objects (like products, resources, or production orders) are defined.
  
  Cause:
  The error message PPEACT618 is triggered when the system detects that the relationship you are trying to establish or modify is not valid. This can happen due to several reasons, including:
  
  
  Incorrect Object Types: The types of objects you are trying to relate do not support the relationship you are attempting to create. For example, you might be trying to link a material to a resource in a way that is not allowed.
  
  
  
  Configuration Issues: There may be configuration settings in the system that restrict certain types of relationships. This could be due to settings in the material master, resource master, or