How To Fix PPEENG156 - &1 between &2 and &3 not allowed because it causes recursion

PPEENG156 - Overview

• Message type: E = Error

• Message class: PPEENG - iPPE Engine Messages

• Message number: 156

• Message text: &1 between &2 and &3 not allowed because it causes recursion

What causes this issue?

You have tried to create a relationship of type &v1& between the
objects &v2& and &v3&. This relation causes recursion in the iPPE
relationship network.

System Response

The system does not allow you to create the relationship of type &v1&
between the objects &v2& and &v3&.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPEENG156 - &1 between &2 and &3 not allowed because it causes recursion ?

  The SAP error message PPEENG156 indicates that there is a recursion issue in the planning process. This typically occurs in the context of production planning or project planning when a certain operation or task is trying to reference itself or is involved in a circular dependency with other operations or tasks.
  
  Cause:
  The error message "PPEENG156 &1 between &2 and &3 not allowed because it causes recursion" usually arises due to:
  
  
  Circular Dependencies: There are operations or tasks that depend on each other in a way that creates a loop. For example, if Task A depends on Task B, and Task B also depends on Task A, this creates a recursion.
  
  
  Incorrect Configuration: The configuration of the planning parameters or the relationships between tasks may not be set up correctly, leading to unintended dependencies.
  
  
  Data Integrity Issues: There may be issues with the data in the system, such as incorrect links between operations or tasks.
  
  
  
  Solution:
  To