How To Fix 8A556 - Format of reference document number is invalid

8A556 - Overview

• Message type: E = Error

• Message class: 8A - Messages for Argentina

• Message number: 556

• Message text: Format of reference document number is invalid

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.

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8A556 - Details

• The SAP error message 8A556 indicates that the format of the reference document number is invalid. This error typically occurs when the system expects a specific format for the reference document number, but the input does not conform to that format.
  Causes:
  
  Incorrect Format: The reference document number may not match the expected format defined in the system settings. This could include issues with length, character types (e.g., numeric vs. alphanumeric), or specific prefixes/suffixes.
  
  Configuration Issues: The configuration settings for document number ranges or formats may not be set up correctly in the SAP system.
  User Input Error: The user may have entered the reference document number incorrectly, including typos or incorrect characters.
  Data Migration Issues: If data has been migrated from another system, the reference document numbers may not conform to the expected format in SAP.
  
  Solutions:
  
  Check Input: Verify that the reference document number is entered correctly. Ensure that it adheres to the expected format