How To Fix B1636 - Number of tRFC calls to IDocs with the defined selection criteria

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 636

• Message text: Number of tRFC calls to IDocs with the defined selection criteria

What causes this issue?

Contains a performance attribute that specifies the number of open tRFC
calls of IDocs for this ALE monitoring object.

How to fix this error?

You can process the tRFCs in transaction SM58.

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 B1636 - Number of tRFC calls to IDocs with the defined selection criteria ?

  The SAP error message B1636 indicates that the number of tRFC (Transactional Remote Function Call) calls to IDocs (Intermediate Documents) has exceeded the defined selection criteria. This typically occurs when there are too many IDocs being processed in a single batch or when the system is overwhelmed with requests.
  Cause:
  
  High Volume of IDocs: The system is trying to process a large number of IDocs at once, which exceeds the limits set in the configuration.
  Configuration Limits: The system has predefined limits for the number of tRFC calls that can be processed simultaneously or within a certain timeframe.
  Performance Issues: The system may be experiencing performance issues, leading to delays in processing IDocs, which can cause a backlog.
  Network Issues: Problems with network connectivity can also lead to delays in processing tRFC calls.
  
  Solution:
  
  Adjust tRFC Settings: Review and adjust the settings for tRFC calls in the SAP system. This can be done in transaction SM58 (tRFC Monitor) or by adjusting the relevant parameters in the system configuration.
  Batch Processing: If possible, reduce the number of IDocs being processed in a single batch. This can help to stay within the limits set for tRFC calls.
  Monitor IDoc Processing: Use transaction WE02 or WE05 to monitor IDoc processing and identify any that are stuck or in error. Resolve any issues with these IDocs.
  Increase System Resources: If the system is consistently overwhelmed, consider increasing the resources available to the SAP system (e.g., CPU, memory).
  Check for Errors: Investigate any errors in the IDoc processing that may be causing delays. Use transaction SM21 to check the system log for any related errors.
  Review Network Configuration: Ensure that there are no network issues affecting the communication between systems, especially if you are working in a distributed environment.
  
  Related Information:
  
  Transaction Codes:
  
  SM58: Monitor tRFC calls.
  WE02 / WE05: Monitor IDocs.
  SM21: System log for error messages.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on configuration settings.
  Performance Tuning: Consider performance tuning for the SAP system to handle higher loads more effectively.
  
  By following these steps, you should be able to resolve the B1636 error and improve the processing of IDocs in your SAP system.