How To Fix >A018 - Error in module &1; invalid data returned in parameter &2

SAP Error Message - Details

• Message type: E = Error

• Message class: >A -

• Message number: 018

• Message text: Error in module &1; invalid data returned in parameter &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message >A018 - Error in module &1; invalid data returned in parameter &2 ?

  The SAP error message A018 indicates that there is an issue with a specific module where invalid data has been returned in a parameter. This error typically arises during the execution of a function module or a method in an ABAP program. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  
  Invalid Data: The error usually occurs when the data returned by a function module or method does not match the expected format or type. This could be due to:
  
  Incorrect input parameters being passed to the function.
  Data inconsistencies in the database.
  Changes in the data structure that are not reflected in the calling program.
  
  
  
  Programming Errors: There may be bugs in the ABAP code that lead to incorrect handling of data.
  
  
  Configuration Issues: Sometimes, configuration settings in the system can lead to unexpected behavior in function modules.
  
  
  Solution:
  
  
  Check Input Parameters: Review the parameters being passed to the function module. Ensure that they are of the correct type and format.
  
  
  Debugging: Use the ABAP debugger to step through the code where the error occurs. This can help identify the exact point of failure and the state of the variables involved.
  
  
  Review Function Module: Check the documentation for the function module being called. Ensure that you are using it correctly and that the expected data types and structures are being adhered to.
  
  
  Data Consistency: Verify the data in the database tables involved. Look for any inconsistencies or corruption that might be causing the function to return invalid data.
  
  
  Check for Updates: If the error is related to a standard SAP function module, check if there are any SAP Notes or updates that address this issue. Sometimes, SAP releases patches that fix known bugs.
  
  
  Consult Documentation: Review the SAP documentation for the specific module or function you are working with. There may be additional information or prerequisites that need to be met.
  
  
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  
  Related Information:
  
  SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that might address this specific error message.
  ABAP Documentation: Familiarize yourself with the ABAP programming guidelines and best practices to avoid similar issues in the future.
  Community Forums: Check SAP community forums or other online resources where similar issues may have been discussed.
  
  By following these steps, you should be able to diagnose and resolve the A018 error in your SAP environment.