How To Fix TQ051 - RFC error when calling function module SUBST_EVAL_LOCATION

SAP Error Message - Details

• Message type: E = Error

• Message class: TQ - SAPup Messages

• Message number: 051

• Message text: RFC error when calling function module SUBST_EVAL_LOCATION

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message TQ051 - RFC error when calling function module SUBST_EVAL_LOCATION ?

  The SAP error message TQ051, which indicates an RFC (Remote Function Call) error when calling the function module SUBST_EVAL_LOCATION, typically arises due to issues in communication between the SAP systems or problems with the function module itself. Here’s a breakdown of the potential causes, solutions, and related information:
  Causes of TQ051 RFC Error
  
  
  Network Issues: There may be network connectivity problems between the SAP systems involved in the RFC call.
  
  
  Configuration Issues: The RFC destination may not be correctly configured. This includes incorrect settings in the RFC destination (SM59) or missing authorizations.
  
  
  Function Module Issues: The function module SUBST_EVAL_LOCATION may have issues such as incorrect parameters being passed, or it may not be properly implemented in the target system.
  
  
  System Load: The target system may be experiencing high load or may be down, leading to timeouts or failures in processing the RFC call.
  
  
  Authorization Issues: The user executing the RFC call may not have the necessary authorizations to execute the function module.
  
  
  Solutions
  
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 and check the configuration of the RFC destination used for the call.
  Test the connection from the source system to the target system using the "Connection Test" option in SM59.
  
  
  
  Review Function Module Parameters: Ensure that the parameters being passed to SUBST_EVAL_LOCATION are correct and valid. Check the documentation for the function module to confirm the expected input.
  
  
  Check System Status: Verify that the target system is up and running and not under heavy load. You can check system logs and performance metrics.
  
  
  Authorization Check: Ensure that the user executing the RFC call has the necessary authorizations. You can check this in transaction SU53 after the error occurs to see if there are any authorization issues.
  
  
  Review Logs: Check the system logs (transaction SM21) and the developer trace (transaction ST22) for any additional error messages that might provide more context about the issue.
  
  
  Consult SAP Notes: Look for any relevant SAP Notes that might address known issues with the SUBST_EVAL_LOCATION function module or the TQ051 error.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  ST22: Dump Analysis
  SM21: System Log
  SU53: Authorization Check
  SE37: Function Module Display
  
  
  
  SAP Documentation: Refer to the official SAP documentation for the SUBST_EVAL_LOCATION function module for detailed information on its parameters and usage.
  
  
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to diagnose and resolve the TQ051 RFC error when calling the SUBST_EVAL_LOCATION function module.