How To Fix 8A551 - Format of reference document number is invalid

8A551 - Overview

• Message type: E = Error

• Message class: 8A - Messages for Argentina

• Message number: 551

• Message text: Format of reference document number is invalid

What causes this issue?

You have chosen a document type that is relevant for official Argentine
document numbering and for which the official document number is not
automatically generated. That means that you have to enter the official
document number in the reference field in the following format:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

XXXXANNNNNNNN
XXXX: 4 digit number for the issuing branch
A: Printing character
NNNNNNNN: 8 digit number field

How to fix this error?

Please enter the official document number in the format desribed above.
Please check also that the printing character entered in position 5 is
defined in your customizing settings of the possible printing
characters.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 8A551 - Format of reference document number is invalid ?

  The SAP error message 8A551 indicates that the format of the reference document number you are trying to enter is invalid. This error typically occurs in the context of financial transactions, such as when processing invoices, payments, or other accounting documents.
  
  Cause:
  
  
  Incorrect Format: The reference document number may not conform to the expected format defined in the system. This could be due to:
  
  Incorrect length (too short or too long).
  Invalid characters (e.g., special characters that are not allowed).
  Incorrect structure (e.g., missing required prefixes or suffixes).
  
  
  
  
  Configuration Issues: The document number format may not be properly configured in the system settings. This can happen if the number range or format settings have been changed or not set up correctly.
  
  
  User Input Error: The user may have mistakenly entered the reference document number incorrectly.
  
  
  
  Solution:
  
  
  Check the Format: Verify the expected format for the reference document number in your SAP system. This can usually be found in the