How To Fix PG449 - Note: Conversion class &1 must be encoded manually.

SAP Error Message - Details

• Message type: E = Error

• Message class: PG - Error Messages for Master Data Programs

• Message number: 449

• Message text: Note: Conversion class &1 must be encoded manually.

What causes this issue?

The program PM01 generates only the empty conversion class with the
correct interface.

System Response

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

How to fix this error?

The conversion class converts the data saved in the database (PS
structure) into the data displayed on the screen (screen structure) and
vice versa. The conversions are infotype-specific and cannot be
generated. For information about programming, see the document "UI
Programming Guidelines for Infotypes" in the Knowledge Warehouse. (See
also the application help (PM01).)

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PG449 - Note: Conversion class &1 must be encoded manually. ?

  The SAP error message PG449, which states "Conversion class &1 must be encoded manually," typically occurs in the context of data conversion or data transfer processes within SAP systems. This error indicates that the system has encountered a conversion class that cannot be automatically handled and requires manual intervention.
  Cause:
  
  Custom Conversion Classes: The error often arises when a custom conversion class is used that the system does not recognize or cannot automatically encode.
  Missing Encoding Logic: The conversion class may lack the necessary encoding logic or methods that are required for the system to process it.
  Data Type Mismatch: There may be a mismatch between the expected data type and the actual data being processed, leading to the inability to convert automatically.
  Configuration Issues: Incorrect configuration settings in the data transfer or conversion process can also lead to this error.
  
  Solution:
  
  
  Manual Encoding: As the error suggests, you will need to manually encode the conversion class. This involves implementing the necessary logic to handle the conversion correctly.
  
  Check the documentation for the conversion class to understand what encoding is required.
  Implement the encoding logic in the appropriate method of the conversion class.
  
  
  
  Review Custom Code: If the conversion class is custom, review the code to ensure that it adheres to the expected standards and includes all necessary methods for encoding.
  
  
  Check Data Types: Ensure that the data types being passed to the conversion class are correct and compatible with what the class expects.
  
  
  Consult SAP Notes: Look for relevant SAP Notes that may provide additional guidance or patches related to this error. SAP Notes can often provide insights into known issues and their resolutions.
  
  
  Testing: After making changes, thoroughly test the conversion process to ensure that the error is resolved and that data is being processed correctly.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for details on conversion classes and their implementation.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have found.
  Debugging: Use the SAP debugging tools to trace the execution of the conversion class and identify where the failure occurs.
  
  If the issue persists after attempting these solutions, it may be beneficial to consult with an SAP expert or reach out to SAP support for further assistance.