How To Fix OM511 - Quantity structure type &1 is already being used. You cannot change it

SAP Error Message - Details

• Message type: E = Error

• Message class: OM - Customizing Materialwirtschaft

• Message number: 511

• Message text: Quantity structure type &1 is already being used. You cannot change it

What causes this issue?

You want to change the time-dependency. As the quantity structure
category &V1& is already used with this control, and there are mixing
ratios, you can no longer change the time-dependency.

System Response

The system has restored the original control.

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 OM511 - Quantity structure type &1 is already being used. You cannot change it ?

  The SAP error message OM511 indicates that you are trying to change a quantity structure type that is currently in use. This typically occurs in the context of SAP's configuration for materials management, production planning, or similar modules where quantity structures are defined.
  Cause:
  
  In Use: The quantity structure type you are trying to modify is already being utilized in existing configurations, such as in production orders, material master records, or other related objects.
  Dependencies: There may be dependencies or links to other configurations that prevent changes to the quantity structure type.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to make changes to certain configurations.
  
  Solution:
  
  Check Usage: Identify where the quantity structure type is being used. You can do this by checking related configurations or using transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to look for references to the structure type.
  Remove Dependencies: If possible, remove or adjust any dependencies that are preventing the change. This may involve deleting or modifying existing records that reference the quantity structure type.
  Consult Documentation: Review SAP documentation or configuration guides related to the specific module you are working with to understand the implications of changing the quantity structure type.
  Change in a Test Environment: If you are working in a production environment, consider making changes in a test or development environment first to ensure that there are no adverse effects.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is a critical configuration.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OMJJ (for inventory management), OMCQ (for quantity structure), and others that may help you navigate the configuration.
  Documentation: Review SAP Help Portal or SAP Notes related to quantity structure types for more detailed guidance.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to configuration settings in SAP.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.