How To Fix PPECHK406 - Activity &1 is not assigned to alternative line &2 between &3 and &4

PPECHK406 - Overview

• Message type: E = Error

• Message class: PPECHK - iPPE Consistency Check

• Message number: 406

• Message text: Activity &1 is not assigned to alternative line &2 between &3 and &4

What causes this issue?

A line structure contains alternative lines.
The system has found
line balance relationships to alternative line structures
for the activity &V1&.
However, the activity is not assigned to all alternative lines.
The system has not found any line balance relationships
to alternative line &V2& for the activity &V1&.

System Response

For the missing assignment,
the system generates a default assignment for the activity to the
alternative line. The system can then
generate requirements in the Rapid Planning Matrix for the components
that are assigned to this activity even if the order uses
one of the alternative lines that has no line balance relationship.
If the order does not use one of the alternative lines for
which a line balance relationship exist, the activity is not included
in activity confirmation or the activity matrix in the Rapid Planning
Matrix. Only those activities for which an active line balance exists
are considered.

How to fix this error?

Create the missing line balance relationship.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPECHK406 - Activity &1 is not assigned to alternative line &2 between &3 and &4 ?

  The SAP error message PPECHK406 indicates that a specific activity is not assigned to an alternative line within a defined time frame. This error typically arises in the context of production planning and scheduling, particularly when working with alternative lines in a production process.
  
  Cause:
  The error occurs when:
  
  An activity (e.g., a specific task or operation) is expected to be executed on an alternative line, but it has not been assigned to that line.
  The time frame specified (between &3 and &4) does not include any valid assignments for the activity on the alternative line &2.
  There may be configuration issues in the production planning setup, such as missing or incorrect assignments in the routing or work center.
  
  
  Solution:
  To resolve the PPECHK406 error, you can take the following steps:
  
  
  Check Activity Assignment:
  
  Go to the routing or work center configuration in SAP and verify that the activity &1 is correctly assigned to the alternative line &2.
  Ensure that