How To Fix CRM_APO106 - Availability check: ATP system broke down after initialization

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_APO - Dates

• Message number: 106

• Message text: Availability check: ATP system broke down after initialization

What causes this issue?

A communication error occurred with the ATP System (after
initialization) and the RFC connection was terminated.

System Response

The document is marked as incorrect and locked for follow-up processing.

How to fix this error?

When the connection to the ATP System is re-established, you must
trigger the ATP again.

Procedure for System Administrators

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 CRM_APO106 - Availability check: ATP system broke down after initialization ?

  The SAP error message CRM_APO106 indicates that there is an issue with the Availability Check (ATP) system, specifically that it has "broken down after initialization." This error typically occurs in the context of Advanced Planning and Optimization (APO) when the system is unable to perform the availability check due to various reasons.
  Causes:
  
  System Configuration Issues: There may be misconfigurations in the APO settings or in the integration between SAP ERP and APO.
  Network Issues: Connectivity problems between the ERP system and the APO system can lead to this error.
  Resource Availability: The APO system may not have the necessary resources or data to perform the availability check.
  System Performance: High load on the APO system or insufficient system resources (CPU, memory) can cause the ATP check to fail.
  Data Consistency Issues: Inconsistent or corrupted master data in the APO system can lead to failures during the availability check.
  Authorization Issues: The user executing the availability check may not have the necessary authorizations to access the required data.
  
  Solutions:
  
  Check System Configuration: Review the configuration settings in both the ERP and APO systems to ensure they are correctly set up for ATP checks.
  Network Connectivity: Verify that there are no network issues between the ERP and APO systems. Check for firewalls, VPNs, or other network configurations that might be blocking communication.
  Monitor System Performance: Use transaction codes like ST03N or SM66 to monitor system performance and check for any bottlenecks or resource issues.
  Data Consistency Check: Run consistency checks on master data in the APO system to ensure that all necessary data is available and correct.
  Review Logs: Check the application logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the failure.
  User Authorizations: Ensure that the user has the necessary authorizations to perform the ATP check. This can be checked in transaction SU53 or by reviewing the user's roles and authorizations.
  Restart Services: If the issue persists, consider restarting the relevant services or processes in the APO system to clear any temporary issues.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches and updates.
  Documentation: Review the SAP Help Portal for documentation on ATP checks and APO configuration.
  Support: If the issue cannot be resolved internally, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages.
  
  By following these steps, you should be able to diagnose and resolve the CRM_APO106 error effectively.