How To Fix CRM_UIU_BT401 - ATP Screen: No Mapped LogSys defined

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_UIU_BT -

• Message number: 401

• Message text: ATP Screen: No Mapped LogSys defined

What causes this issue?

The definition of the mapped logical system APOATP is incorrect.

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?

Procedure for System Administrators

Make an entry in the following transaction: CRMS_IC_CROSS_SYS

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_UIU_BT401 - ATP Screen: No Mapped LogSys defined ?

  The SAP error message "CRM_UIU_BT401 ATP Screen: No Mapped LogSys defined" typically occurs in the context of the Advanced ATP (Available-to-Promise) functionality within SAP CRM (Customer Relationship Management). This error indicates that the system is unable to find a mapped logical system (LogSys) for the ATP screen, which is necessary for the system to retrieve and display availability information.
  Cause:
  
  Missing Logical System Mapping: The error usually arises when there is no logical system defined or mapped for the specific business transaction or application area in the CRM system.
  Configuration Issues: There may be issues in the configuration settings related to the ATP functionality or the logical system settings.
  Transport Issues: If the configuration was recently transported from another system, it might not have been set up correctly in the target system.
  
  Solution:
  
  
  Check Logical System Configuration:
  
  Go to transaction SPRO (SAP Reference IMG).
  Navigate to SAP Customizing Implementation Guide > Cross-Application Components > General Settings > Logical Systems > Define Logical Systems.
  Ensure that the logical system for your CRM system is defined and correctly configured.
  
  
  
  Mapping Logical Systems:
  
  In the same area, check the mapping of logical systems. You can find this under Cross-Application Components > General Settings > Logical Systems > Assign Logical Systems to Clients.
  Ensure that the logical system is assigned to the correct client.
  
  
  
  Check ATP Configuration:
  
  Ensure that the ATP configuration is correctly set up. This can be found under Sales and Distribution > Basic Functions > Availability Check > Availability Check with ATP in the IMG.
  Verify that the settings for the ATP check are correctly defined.
  
  
  
  Transport Requests:
  
  If the issue arose after a transport, check the transport logs to ensure that all necessary objects were transported correctly.
  If needed, re-transport the configuration or manually adjust the settings in the target system.
  
  
  
  Testing:
  
  After making the necessary changes, test the ATP functionality again to see if the error persists.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP Help Portal for documentation on ATP configuration and logical system settings.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or functional team for further investigation.