How To Fix CNV_DMC_UI_FW_DYNPRO004 - Subscreens dynnr variable cannot be referenced.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_UI_FW_DYNPRO - Messages for dynpro framework

• Message number: 004

• Message text: Subscreens dynnr variable cannot be referenced.

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_DMC_UI_FW_DYNPRO004 - Subscreens dynnr variable cannot be referenced. ?

  The SAP error message CNV_DMC_UI_FW_DYNPRO004 with the description "Subscreens dynnr variable cannot be referenced" typically occurs in the context of SAP Data Migration Cockpit (DMC) or during the execution of a custom or standard SAP transaction that involves dynamic screens (dynpros).
  Cause:
  This error usually arises due to one of the following reasons:
  
  
  Dynamic Screen Handling: The system is trying to reference a dynamic screen number (dynnr) that is not properly defined or initialized. This can happen if the screen is not available or if there is a mismatch in the screen number being referenced.
  
  
  Custom Development Issues: If there are custom developments or modifications in the transaction or program, it may lead to incorrect handling of screen numbers.
  
  
  Configuration Issues: There might be issues with the configuration of the Data Migration Cockpit or the specific migration project you are working on.
  
  
  Transport Issues: If the transport of objects related to the DMC or the specific transaction was not successful, it could lead to missing or inconsistent screen definitions.
  
  
  Solution:
  To resolve this error, you can try the following steps:
  
  
  Check Screen Definitions: Verify that the screen definitions for the transaction or program are correctly defined in the SAP system. Ensure that the screen number being referenced exists.
  
  
  Debugging: If you have access to the ABAP code, you can debug the program to see where the dynnr variable is being set and referenced. Look for any logic that might be causing it to reference an undefined screen.
  
  
  Review Custom Code: If there are any custom enhancements or modifications, review them to ensure they are correctly handling the dynamic screens.
  
  
  Check Configuration: Ensure that the Data Migration Cockpit is properly configured and that all necessary settings are in place for the migration project you are working on.
  
  
  Transport Check: If this issue arose after a transport, check the transport logs to ensure that all objects were transported correctly and that there are no missing components.
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error. There may be patches or updates available that resolve known issues.
  
  
  Consult Documentation: Review the official SAP documentation for the Data Migration Cockpit and any related components to ensure that you are following the correct procedures.
  
  
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  
  Related Information:
  
  SAP Data Migration Cockpit: This is a tool used for data migration in SAP S/4HANA projects. Understanding its configuration and usage can help in troubleshooting related issues.
  ABAP Debugging: Familiarity with ABAP debugging techniques can be beneficial for identifying issues in custom code.
  SAP Notes and Knowledge Base Articles: Regularly check for updates and fixes related to the Data Migration Cockpit and dynamic screen handling.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message CNV_DMC_UI_FW_DYNPRO004.