How To Fix OXYGEN021 - Error calling function module &1

SAP Error Message - Details

• Message type: E = Error

• Message class: OXYGEN - Messages from the O2 Compiler

• Message number: 021

• Message text: Error calling function module &1

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message OXYGEN021 - Error calling function module &1 ?

  The SAP error message OXYGEN021, which states "Error calling function module &1," typically indicates that there is an issue with a specific function module in the SAP system. This error can arise from various causes, and the resolution may depend on the specific context in which the error occurs. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Function Module Not Found: The specified function module (&1) may not exist in the system or may have been deleted.
  Authorization Issues: The user executing the function may not have the necessary authorizations to call the function module.
  Parameter Mismatch: The parameters being passed to the function module may not match the expected input types or formats.
  System Configuration Issues: There may be configuration issues in the system that prevent the function module from executing correctly.
  Transport Issues: If the function module was recently transported from another system, there may be inconsistencies or missing dependencies.
  
  Solutions:
  
  Check Function Module Existence: Verify that the function module exists in the system by using transaction SE37 (Function Builder) and checking for the module name.
  Review Authorizations: Ensure that the user has the necessary authorizations to execute the function module. This can be checked using transaction SU53 or by consulting with your security team.
  Validate Parameters: Review the parameters being passed to the function module. Ensure they are of the correct type and format as expected by the function.
  Debugging: If you have access, use transaction SE80 or SE37 to debug the function module and identify where the error occurs.
  Check Transport Logs: If the function module was recently transported, check the transport logs for any errors or warnings that may indicate issues with the transport.
  Consult Documentation: Review any available documentation for the function module to ensure it is being used correctly.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE37 (Function Builder), SE80 (Object Navigator), and ST22 (Dump Analysis) for further investigation.
  Community Forums: Consider searching or posting in SAP community forums or discussion boards for insights from other users who may have encountered the same issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis or development team for further analysis and resolution.