How To Fix VT558 - Please enter a module pool between 'A' and 'M'

SAP Error Message - Details

• Message type: E = Error

• Message class: VT - Vertriebstabellen

• Message number: 558

• Message text: Please enter a module pool between 'A' and 'M'

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 VT558 - Please enter a module pool between 'A' and 'M' ?

  The SAP error message VT558, which states "Please enter a module pool between 'A' and 'M'," typically occurs when you are trying to enter a module pool name that does not conform to the naming conventions expected by the SAP system. Module pools in SAP are used for dialog programming and must follow specific naming rules.
  Cause:
  
  Invalid Module Pool Name: The name you are trying to enter for the module pool does not start with a letter between 'A' and 'M'. SAP has specific naming conventions for module pools, and names must adhere to these rules.
  Typographical Error: There may be a typographical error in the name you are trying to enter.
  System Configuration: In some cases, system settings or configurations may restrict the naming conventions further.
  
  Solution:
  
  Check the Name: Ensure that the module pool name you are trying to enter starts with a letter between 'A' and 'M'. For example, valid names could be "A12345" or "M98765".
  Correct Typographical Errors: Double-check for any typos in the name you are entering.
  Follow Naming Conventions: Make sure that the name follows the standard SAP naming conventions, which typically include:
  
  Must start with a letter.
  Can contain letters, numbers, and underscores.
  Should not exceed the maximum length (usually 30 characters).
  
  
  Consult Documentation: If you are unsure about the naming conventions, refer to SAP documentation or guidelines for module pool naming.
  
  Related Information:
  
  SAP Module Pools: Module pools are used to create screens and dialog programs in SAP. They are essential for developing user interfaces in ABAP.
  ABAP Development: If you are involved in ABAP development, understanding the naming conventions and structure of module pools is crucial for successful programming.
  SAP Notes: Check SAP Notes for any updates or specific guidelines related to module pool naming conventions that may apply to your version of SAP.
  
  If you continue to experience issues after following these steps, consider reaching out to your SAP administrator or consulting SAP support for further assistance.