How To Fix IO123 - Material number & is already contained in the object list

SAP Error Message - Details

• Message type: E = Error

• Message class: IO - Plant Maintenance: Object List

• Message number: 123

• Message text: Material number & is already contained in the object list

What causes this issue?

You have tried to enter a <DS:GLOS.material number>material number</>
in the <DS:GLOS.object list>object list</> which is already contained
in the object list.

System Response

INCLUDE KEINE-FUNKTION OBJECT DOKU ID TX LANGUAGE EN

How to fix this error?

Delete the entry.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IO123 - Material number & is already contained in the object list ?

  The SAP error message IO123, which states that "Material number & is already contained in the object list," typically occurs in the context of Inventory Management or Production Planning when you are trying to add a material to a list (such as a BOM, production order, or inventory list) that already contains that material.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the material you are trying to add is already present in the list you are working with.
  Incorrect Data Entry: There may be a mistake in the data entry process, such as trying to add the same material multiple times.
  System Configuration: In some cases, the system configuration or customizations may lead to this error if the logic for handling materials is not set up correctly.
  
  Solution:
  
  Check the Object List: Review the object list you are working with to confirm whether the material is already included. If it is, you do not need to add it again.
  Remove Duplicate: If you find that the material is indeed listed and you need to make changes, consider removing it from the list first before attempting to add it again.
  Data Validation: Ensure that the data you are entering is correct and that you are not inadvertently trying to add the same material multiple times.
  Consult Documentation: If you are unsure about the process, refer to the relevant SAP documentation or user manuals for guidance on how to manage materials in the specific context you are working in.
  Contact Support: If the issue persists and you believe it is not due to a duplicate entry, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be using various transaction codes (e.g., CS01 for creating BOMs, CO01 for creating production orders) where this error can occur.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles and Permissions: Ensure that you have the appropriate permissions to modify the object list you are working with, as restrictions may also lead to errors.
  
  By following these steps, you should be able to resolve the IO123 error and continue with your SAP tasks.