How To Fix /SAPAPO/ATP187 - Merge Subitems is only effective if "Create Subitem" is not marked

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 187

• Message text: Merge Subitems is only effective if "Create Subitem" is not marked

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP187 - Merge Subitems is only effective if "Create Subitem" is not marked ?

  The SAP error message /SAPAPO/ATP187 indicates that there is an issue with the configuration of subitems in the Advanced Planning and Optimization (APO) module, specifically in the context of Available-to-Promise (ATP) checks. The error message states that the "Merge Subitems" functionality can only be effective if the "Create Subitem" option is not marked.
  Cause:
  This error typically occurs when:
  
  The system is configured to create subitems, but at the same time, there is an attempt to merge subitems. These two functionalities are mutually exclusive.
  The settings in the APO system for the product or the planning area are conflicting, leading to this error during ATP checks or during the processing of a sales order.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Configuration Settings:
  
  Go to the configuration settings for the product in the APO system.
  Navigate to the settings related to subitems and ensure that the "Create Subitem" option is not selected if you intend to use the "Merge Subitems" functionality.
  
  
  
  Adjust Planning Area Settings:
  
  If you are using a specific planning area, check the settings for that planning area to ensure that the options for subitem creation and merging are configured correctly.
  You may need to consult with your SAP Basis or APO configuration team to make these adjustments.
  
  
  
  Review Product Master Data:
  
  Check the product master data to ensure that the settings for subitems are consistent with your ATP strategy.
  Make sure that the product is set up correctly for the intended ATP behavior.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test ATP check to ensure that the error no longer occurs and that the system behaves as expected.
  
  
  
  Documentation and Support:
  
  If the issue persists, refer to SAP documentation or reach out to SAP support for further assistance. They may provide additional insights or patches if this is a known issue.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on configuring subitems in APO.
  Transaction Codes: Familiarize yourself with transaction codes such as /SAPAPO/ATC for ATP checks and /SAPAPO/SDP94 for product planning, as these may help in troubleshooting.
  User Forums: Consider visiting SAP community forums or user groups where similar issues may have been discussed, providing insights from other users who have faced the same error.
  
  By following these steps, you should be able to resolve the error and ensure that your ATP processes function correctly.