How To Fix VT557 - SAP access sequences cannot begin with Y or Z

SAP Error Message - Details

• Message type: E = Error

• Message class: VT - Vertriebstabellen

• Message number: 557

• Message text: SAP access sequences cannot begin with Y or Z

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 VT557 - SAP access sequences cannot begin with Y or Z ?

  The SAP error message VT557 indicates that there is an issue with the access sequence configuration in the SAP system. Specifically, it states that access sequences cannot begin with the letters "Y" or "Z". This is a restriction in SAP because access sequences that start with these letters are reserved for customer-specific developments or modifications.
  Cause:
  
  Access Sequence Naming Convention: In SAP, standard access sequences are typically prefixed with letters A to X. The system restricts the use of Y and Z for access sequences to avoid conflicts with standard SAP functionality and to ensure that custom developments do not interfere with standard processes.
  Configuration Error: If a user or consultant attempts to create a new access sequence and inadvertently names it starting with Y or Z, this error will be triggered.
  
  Solution:
  
  
  Rename the Access Sequence: The simplest solution is to rename the access sequence to start with a letter from A to X. This can be done in the configuration settings where the access sequence is defined.
  
  Navigate to the relevant configuration path in SAP (usually under Sales and Distribution or Pricing).
  Locate the access sequence that is causing the error.
  Change the name to start with an acceptable letter (A to X).
  
  
  
  Check Existing Access Sequences: If you are modifying an existing access sequence, ensure that it does not start with Y or Z. If it does, you will need to rename it.
  
  
  Review Custom Development Guidelines: If you are working in a custom development environment, ensure that your naming conventions align with SAP's guidelines to avoid similar issues in the future.
  
  
  Related Information:
  
  Access Sequences: Access sequences are used in SAP to determine the order in which the system searches for valid condition records. They are crucial for pricing, output determination, and other areas.
  SAP Customization: When customizing SAP, it is important to follow best practices and naming conventions to avoid conflicts with standard functionality.
  SAP Notes and Documentation: For further details, you can refer to SAP Notes or the official SAP documentation related to access sequences and pricing configuration.
  
  If you continue to experience issues or if the problem is more complex, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.