How To Fix FB664 - Customer & not created, account group & has internal number assignment

FB664 - Overview

• Message type: E = Error

• Message class: FB - Batch Programs

• Message number: 664

• Message text: Customer & not created, account group & has internal number assignment

Self-Explanatory Message

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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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FB664 - Details

• The SAP error message FB664 indicates that a customer cannot be created because the specified account group has internal number assignment. This means that the system is set up to automatically generate customer numbers for the specified account group, and the user is trying to manually assign a customer number, which is not allowed.
  
  Cause:
  
  Internal Number Assignment: The account group you are trying to use for the customer has been configured to use internal number assignment. This means that the system will automatically generate a customer number when a new customer is created.
  Manual Number Assignment Attempt: If you attempt to manually enter a customer number while creating a customer in an account group that uses internal number assignment, the system will throw this error.
  
  
  Solution:
  
  Allow the System to Generate the Number: When creating a new customer, do not enter a customer number. Leave the customer number field blank, and the system will