How To Fix WR027 - First material must be before the second material in sequence

SAP Error Message - Details

• Message type: E = Error

• Message class: WR - Messages for Revaluation at Retail

• Message number: 027

• Message text: First material must be before the second material in sequence

What causes this issue?

Price determination for the entered EAN could not be simulated.

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?

Please enter an EAN which the SAP System knows.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WR027 - First material must be before the second material in sequence ?

  Certainly! Here's a detailed explanation for the SAP error message WR027: "First material must be before the second material in sequence":
  
  Error Message: WR027
  Text:
  
  First material must be before the second material in sequence
  
  Cause:
  This error occurs when you are trying to maintain or process a sequence of materials (e.g., in a BOM, routing, or a sequence-dependent process) and the system detects that the order of materials is incorrect. Specifically, the "first material" should appear before the "second material" in the defined sequence, but the system finds the opposite.
  Common scenarios include:
  
  When defining or changing a BOM (Bill of Materials) where components must be listed in a certain sequence.
  When working with routing operations or production sequences where materials/components are expected to follow a logical order.
  When maintaining material sequences in processes like inspection plans, production orders, or batch management.
  
  The system enforces this sequence to ensure logical consistency and correct processing order.
  
  Solution:
  
  
  Check the sequence/order of materials:
  
  Review the sequence numbers or positions assigned to the materials in the relevant master data (BOM, routing, inspection plan, etc.).
  Ensure that the material designated as "first" actually has a lower sequence number or position than the "second" material.
  
  
  
  Correct the sequence:
  
  Adjust the sequence numbers so that the first material appears before the second material.
  For example, if material A should come before material B, ensure that material A has a sequence number less than material B.
  
  
  
  Save and reprocess:
  
  After correcting the sequence, save the data and try the operation again.
  
  
  
  Check for dependencies or constraints:
  
  Sometimes, the sequence is controlled by dependencies or constraints in the system (e.g., in routing or inspection plans). Make sure these are consistent.
  
  
  
  
  Additional Information:
  
  
  Where it occurs:
  
  This message is typically encountered in transactions related to BOM maintenance (CS01, CS02), routing (CA01, CA02), production order processing, or inspection plan maintenance.
  
  
  Related SAP Notes:
  
  If the problem persists despite correcting the sequence, check SAP Notes or OSS for any known issues related to your SAP version.
  
  
  Debugging:
  
  If you have access to debugging, you can trace the point where the sequence check is performed to understand why the system considers the order incorrect.
  
  
  User Tips:  
  
  Always maintain sequences carefully when creating or changing BOMs or routings.
  Use the standard SAP tools to reorder components or operations rather than manual adjustments.
  
  
  
  
  If you provide the exact transaction or context where you encountered this error, I can give more tailored advice.