How To Fix IS818 - Double reference -> material will be ignored

SAP Error Message - Details

• Message type: E = Error

• Message class: IS - Equipment management

• Message number: 818

• Message text: Double reference -> material will be ignored

What causes this issue?

You have entered both a <GL:equipment>piece of equipment</> and a
<GL:material>material</> as a reference.
You can enter <ZH>either</> a piece of equipment
<ZH>or</> a material as a reference but not both.

System Response

The system will use the piece of equipment as ther reference instead
of the material.

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.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IS818 - Double reference -> material will be ignored ?

  The SAP error message IS818 ("Double reference -> material will be ignored") typically occurs in the context of material master data or during the processing of certain transactions related to materials, such as inventory management or production planning. This error indicates that there is a duplicate reference to a material in the system, which prevents the system from processing the transaction correctly.
  Cause:
  
  Duplicate Material References: The most common cause of this error is that the same material is being referenced multiple times in a transaction or in the configuration of a process (e.g., BOM, routing, etc.).
  Incorrect Configuration: There may be issues in the configuration of the material master or related objects that lead to the system interpreting the same material in multiple contexts.
  Data Integrity Issues: There could be inconsistencies or corruption in the material master data, leading to the system recognizing duplicate entries.
  
  Solution:
  
  Check Material Master Data: Review the material master records to ensure that there are no duplicate entries. You can use transaction codes like MM03 (Display Material) to check the details of the materials involved.
  Review Transaction Data: If the error occurs during a specific transaction, check the transaction data for any duplicate entries or references to the same material.
  Correct Configuration: If the error is related to configuration (e.g., BOMs, routings), ensure that the configuration does not reference the same material multiple times in a way that is not allowed.
  Data Cleanup: If you find duplicate entries or references, you may need to clean up the data. This could involve deleting or merging duplicate materials or correcting the references in the relevant transactions.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the error message and its context.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) for managing material master data.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional insights or solutions.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who can provide deeper insights into the specific configuration and data setup in your SAP environment.