How To Fix AA204 - External number allocation terminated - External number required

AA204 - Overview

• Message type: E = Error

• Message class: AA - Messages for Asset Accounting

• Message number: 204

• Message text: External number allocation terminated - External number required

What causes this issue?

External asset numbers are allocated in this class. A pop-up? window is
used for this. You have terminated processing.

System Response

The system cannot create a master record without an asset number. The
system will display the initial request screen again.

How to fix this error?

A. If you want to create an asset in this class, enter an asset number,
or
B. use an asset class which does not have external number allocation

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

Error message extract from SAP system. Copyright SAP SE.

AA204 - Details

• The SAP error message AA204: External number allocation terminated - External number required typically occurs in the Asset Accounting (FI-AA) module when you attempt to create or manage an asset without providing a required external number. This error is related to the configuration of number ranges for asset master records.
  
  Cause:
  
  Missing External Number Assignment: The system is configured to require an external number for asset creation, but the user did not provide one.
  Number Range Configuration: The number range for the asset master record may be set to "External" in the configuration, meaning that the user must manually enter a number.
  User Authorization: The user may not have the necessary authorization to create assets with external numbers.
  
  
  Solution:
  
  Provide an External Number: When creating or modifying an asset, ensure that you enter a valid external number in the appropriate field.
  Check Number Range Configuration:
  Go to the transaction code OAOA (or SPRO -> Financial Accounting -> Asset