How To Fix >1606 - Function module not allowed to be called directly

SAP Error Message - Details

• Message type: E = Error

• Message class: >1 - Shockwave SAPGUI message handling

• Message number: 606

• Message text: Function module not allowed to be called directly

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message >1606 - Function module not allowed to be called directly ?

  The SAP error message "1606 Function module not allowed to be called directly" typically occurs when a function module is being invoked in a way that is not permitted by its design. This error is often related to the use of function modules that are intended to be called only by specific programs or through certain interfaces, rather than being called directly by users or other programs.
  Cause:
  
  Direct Invocation: The function module is being called directly in a way that is not allowed. Some function modules are designed to be called only by specific SAP programs or through certain transactions.
  Authorization Issues: The user may not have the necessary authorizations to call the function module.
  Incorrect Usage: The function module may require certain parameters or context that are not being provided when called directly.
  
  Solution:
  
  Check Documentation: Review the documentation for the function module to understand its intended use and any restrictions on direct calls.
  Use Appropriate Interfaces: Instead of calling the function module directly, use the appropriate transaction or program that is designed to invoke it.
  Review Parameters: Ensure that all required parameters are being passed correctly if you are calling it from a program that is allowed to do so.
  Authorization Check: Verify that the user has the necessary authorizations to execute the function module.
  Debugging: If you are developing or modifying code, use the debugger to trace the execution and see where the call is being made incorrectly.
  
  Related Information:
  
  Function Module Attributes: You can check the attributes of the function module in transaction SE37. Look for the "Attributes" tab to see if it has any restrictions on direct calls.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional context.
  Community Forums: Consider checking SAP Community forums or other developer forums for similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or development team for further assistance.