How To Fix CH305 - Screen number "&" is not valid

SAP Error Message - Details

• Message type: E = Error

• Message class: CH - CAD/PP integration messages

• Message number: 305

• Message text: Screen number "&" is not valid

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CH305 - Screen number "&" is not valid ?

  The SAP error message CH305, which states "Screen number '&' is not valid," typically occurs when there is an issue with the screen number being referenced in a transaction or program. This error can arise in various contexts, such as when customizing screens or when there are inconsistencies in the screen definitions.
  Causes:
  
  Invalid Screen Number: The screen number being called does not exist in the system or is incorrectly specified.
  Missing Screen Definition: The screen definition may not have been created or activated in the SAP system.
  Transport Issues: If the screen was transported from one system to another, it may not have been included in the transport request.
  Program Errors: There may be a coding error in the ABAP program that is trying to call the screen.
  Authorization Issues: The user may not have the necessary authorizations to access the screen.
  
  Solutions:
  
  Check Screen Number: Verify that the screen number being referenced is correct and exists in the system. You can do this by checking the screen in the relevant transaction or using the Screen Painter (SE80).
  Activate Screen: If the screen exists but is not activated, activate it using transaction SE80 or SE41.
  Review Transport Requests: If the screen was recently transported, ensure that the transport request included the screen and that it was successfully imported into the target system.
  Debugging: If you have access to the ABAP code, use the debugger to trace where the screen number is being called and check for any logical errors.
  Check Authorizations: Ensure that the user has the necessary authorizations to access the screen. This can be checked in transaction SU53 or by reviewing the user's roles and authorizations.
  Consult Documentation: If the screen is part of a standard SAP module, consult the SAP documentation or support notes for any known issues or updates related to that screen.
  
  Related Information:
  
  Transaction Codes: SE80 (Object Navigator), SE41 (Menu Painter), SE93 (Transaction Codes), SE37 (Function Module), and SE38 (ABAP Program).
  SAP Notes: Check SAP Notes for any specific issues related to the screen or transaction you are working with.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP Basis or development team for further assistance.