How To Fix BB050 - *** reserved for generating subscreens

SAP Error Message - Details

• Message type: E = Error

• Message class: BB - Coding Block

• Message number: 050

• Message text: *** reserved for generating subscreens

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BB050 - *** reserved for generating subscreens ?

  The SAP error message BB050, which states "*** reserved for generating subscreens," typically occurs in the context of screen programming in SAP, particularly when dealing with subscreens in module pool programming (also known as dialog programming). This error indicates that there is an issue with the screen number or the way subscreens are being defined or used in your program.
  Cause:
  
  Screen Number Conflict: The error often arises when there is a conflict with screen numbers. SAP reserves certain ranges of screen numbers for specific purposes, and if your program tries to use a reserved number, this error will occur.
  Incorrect Subscreen Definition: If the subscreen is not defined correctly in the main screen or if the subscreen is not properly linked to the main screen, it can lead to this error.
  Missing or Incorrect Screen Attributes: If the screen attributes are not set correctly, or if the subscreen is not properly defined in the program, it can trigger this error.
  
  Solution:
  
  Check Screen Numbers: Ensure that the screen numbers you are using for your subscreens do not fall within the reserved ranges. Typically, SAP reserves screen numbers in the range of 9000 to 9999 for customer use, but you should avoid using numbers that are already in use by SAP.
  Review Subscreen Definitions: Go through your screen definitions in the Screen Painter and ensure that the subscreen is correctly defined and linked to the main screen. Make sure that the subscreen is being called correctly in the main screen's flow logic.
  Check Program Logic: Review the ABAP code to ensure that the subscreen is being called correctly in the PBO (Process Before Output) and PAI (Process After Input) modules. Ensure that the correct screen numbers are being referenced.
  Use Transaction SE80: Use the Object Navigator (transaction SE80) to check the screen definitions and ensure that everything is set up correctly.
  Debugging: If the issue persists, consider debugging the program to trace where the error is being triggered. This can help identify any logical errors in the code.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for screen programming and module pool development for best practices and guidelines.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  ABAP Development Guidelines: Familiarize yourself with ABAP development guidelines to avoid common pitfalls in screen programming.
  
  If you continue to experience issues after following these steps, it may be beneficial to consult with an experienced ABAP developer or SAP consultant who can provide more tailored assistance based on your specific scenario.