How To Fix AC491 - The key for rule &1 is in the SAP name range

SAP Error Message - Details

• Message type: E = Error

• Message class: AC - Error messages from Asset Customizing

• Message number: 491

• Message text: The key for rule &1 is in the SAP name range

What causes this issue?

The key you entered for rule &V1& is in the SAP name range.

System Response

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

How to fix this error?

Enter a key for the rule that is not in the SAP name range of 00 - 89.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AC491 - The key for rule &1 is in the SAP name range ?

  The SAP error message AC491 indicates that there is an issue with the key for a specific rule in the SAP name range. This typically occurs in the context of Asset Accounting (FI-AA) when you are trying to create or modify an asset master record or related configuration.
  Cause:
  The error message AC491 is triggered when the key you are trying to use for a specific rule is already reserved or used within the SAP name range. This can happen if:
  
  The key you are trying to use is already assigned to another object or rule in the system.
  There is a naming conflict due to the key being part of the SAP standard naming conventions or reserved names.
  
  Solution:
  To resolve the AC491 error, you can take the following steps:
  
  
  Check Existing Keys: Verify if the key you are trying to use is already in use. You can do this by checking the relevant configuration or master data tables in SAP.
  
  
  Use a Different Key: If the key is indeed in use, you will need to select a different key that is not already reserved or used in the SAP name range.
  
  
  Review Configuration: If you are working with custom configurations, ensure that your naming conventions do not conflict with SAP's reserved names. 
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidelines on naming conventions and reserved keys in your specific version of SAP.
  
  
  Check Authorization: Ensure that you have the necessary authorizations to create or modify the asset rules. Sometimes, lack of proper authorization can lead to unexpected errors.
  
  
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They can provide insights specific to your system configuration.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as AS01 (Create Asset), AS02 (Change Asset), and OAOA (Define Depreciation Areas) to navigate through Asset Accounting.
  SAP Notes: Check for any SAP Notes related to error AC491 for additional context or patches that may address the issue.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the AC491 error and implement a suitable solution.