How To Fix CNV_10020428 - Specific subprogram &1(&2) does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 428

• Message text: Specific subprogram &1(&2) does not exist

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020428 - Specific subprogram &1(&2) does not exist ?

  The SAP error message CNV_10020428 indicates that a specific subprogram (function module or method) referenced in the conversion process does not exist. This error typically arises during data migration or conversion activities, particularly when using SAP's Data Migration tools or during system upgrades.
  
  Cause:
  
  
  Missing Function Module/Method: The specified subprogram (function module or method) is not available in the system. This could be due to:
  
  The function module was not activated or was deleted.
  The function module is part of a package that has not been imported or is not available in the current system.
  The function module is part of a custom development that has not been transported to the system.
  
  
  
  Incorrect Configuration: The configuration settings may point to a non-existent or incorrectly named subprogram.
  
  
  Version Mismatch: If you are migrating data from an older version of SAP to a newer one, there may be changes in the function modules or methods that are no longer