How To Fix AQV013 - Function modules may only be used once

SAP Error Message - Details

• Message type: E = Error

• Message class: AQV - Message texts for SAP Query

• Message number: 013

• Message text: Function modules may only be used once

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message AQV013 - Function modules may only be used once ?

  The SAP error message AQV013, which states "Function modules may only be used once," typically occurs in the context of ABAP programming when a function module is being called multiple times in a way that is not allowed. This error is often related to the use of function modules that are designed to be called only once within a particular context, such as when they are used in a specific transaction or report.
  Cause:
  
  Multiple Calls: The function module is being called multiple times in a single execution context, which is not permitted.
  Incorrect Logic: The logic in the ABAP program may inadvertently lead to multiple calls to the same function module.
  Improper Use of Function Modules: Some function modules are designed to be used in a specific way, and calling them outside of that context can lead to this error.
  
  Solution:
  
  Review the Code: Check the ABAP code to identify where the function module is being called. Ensure that it is only called once in the relevant context.
  Refactor Logic: If the function module needs to be called multiple times, consider refactoring the logic to avoid this. You may need to store the result of the function module call in a variable and reuse that variable instead of calling the function module again.
  Check Documentation: Review the SAP documentation for the specific function module to understand its intended use and any restrictions on its usage.
  Use Alternative Approaches: If the function module is not suitable for your needs due to its restrictions, look for alternative function modules or methods that can achieve the same result without triggering the error.
  
  Related Information:
  
  Function Module Documentation: Each function module in SAP has documentation that describes its purpose, parameters, and any restrictions on its use. This can be accessed through transaction SE37 or SE80.
  Debugging: Use the ABAP debugger to step through the code and identify where the function module is being called multiple times.
  SAP Notes: Check the SAP Support Portal for any notes related to the specific function module you are using, as there may be known issues or additional guidance available.
  
  By following these steps, you should be able to resolve the AQV013 error and ensure that your ABAP program runs smoothly.