How To Fix OO_SOURCE_BASED012 - The class contains unknown comments which can't be stored.

SAP Error Message - Details

• Message type: E = Error

• Message class: OO_SOURCE_BASED - WB - Class Builder - Messages for the source-b. Class Editor

• Message number: 012

• Message text: The class contains unknown comments which can't be stored.

What causes this issue?

You wrote a comment outside a method implementation or you commented a
whole method implementation. This is not supported.

System Response

The class has not been saved.

How to fix this error?

Please put all method comments into the method implementation between
the statements METHOD ... ENDMETHOD.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO_SOURCE_BASED012 - The class contains unknown comments which can't be stored. ?

  The SAP error message OO_SOURCE_BASED012 indicates that there are comments in the class that cannot be stored. This typically occurs when there are comments that do not conform to the expected format or contain unsupported characters.
  Cause:
  
  Invalid Comment Syntax: The comments may contain syntax that is not recognized by the ABAP editor.
  Unsupported Characters: The comments might include special characters or formatting that is not allowed.
  Inconsistent Commenting Style: Mixing different commenting styles (e.g., using both * and " for comments) can lead to confusion in the parser.
  Copy-Paste Issues: If comments were copied from another source, they might include hidden characters or formatting that is not compatible with the ABAP environment.
  
  Solution:
  
  Review Comments: Go through the comments in the class and check for any syntax errors or unsupported characters.
  Standardize Commenting Style: Ensure that you are using a consistent commenting style throughout the code. Use either * for block comments or " for inline comments.
  Remove Unsupported Characters: Eliminate any special characters or formatting that may not be supported by the ABAP editor.
  Re-enter Comments: If you suspect that the comments were copied from another source, try retyping them manually to avoid hidden formatting issues.
  Check for Long Comments: If comments are excessively long, consider breaking them into smaller, more manageable pieces.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for guidelines on commenting in ABAP.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Development Guidelines: Follow best practices for coding and commenting in ABAP to avoid similar issues in the future.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP support team or consulting the SAP community for further assistance.