How To Fix OO412 - Only one DATA/TYPES statement can be edited in the screen

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 412

• Message text: Only one DATA/TYPES statement can be edited in the screen

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO412 - Only one DATA/TYPES statement can be edited in the screen ?

  The SAP error message OO412 ("Only one DATA/TYPES statement can be edited in the screen") typically occurs in the ABAP Workbench when you are trying to edit a screen that contains multiple DATA or TYPES statements. In ABAP, you can only have one DATA or TYPES statement in a screen at a time.
  Cause:
  The error is caused by the presence of multiple DATA or TYPES statements in the same screen. This is not allowed in the ABAP programming environment, as it can lead to ambiguity and confusion regarding variable declarations.
  Solution:
  To resolve this error, you need to ensure that there is only one DATA or TYPES statement in the screen. Here are the steps you can take:
  
  
  Open the Screen in the Screen Painter: Go to the screen where the error is occurring.
  
  
  Check for Multiple DATA/TYPES Statements: Look for any DATA or TYPES statements in the screen's flow logic or in the screen attributes.
  
  
  Consolidate Declarations: If you find multiple DATA or TYPES statements, consolidate them into a single statement. You can declare multiple variables or types in one statement by separating them with commas.
  For example, instead of:
  DATA: var1 TYPE i.
  DATA: var2 TYPE c LENGTH 10.
  You can write:
  DATA: var1 TYPE i,
        var2 TYPE c LENGTH 10.
  
  
  Save and Activate: After making the necessary changes, save and activate the screen.
  
  
  Test the Changes: Run the program or transaction to ensure that the error is resolved.
  
  
  Related Information:
  
  ABAP Programming Guidelines: Familiarize yourself with the ABAP programming guidelines to avoid similar issues in the future.
  Screen Painter: The Screen Painter is a tool in the ABAP Workbench that allows you to design and modify screens. Understanding how to use it effectively can help prevent such errors.
  Debugging: If you continue to encounter issues, consider using the debugging tools available in SAP to trace the execution and identify where the problem lies.
  
  By following these steps, you should be able to resolve the OO412 error and continue with your development work in SAP.