Message type: E = Error
Message class:  CMMFSA_SUB_ACCOUNT - Commodity Derivative Order & Trade Execution : Sub Account 
Message number: 138
Message text: Subaccount cannot be invalidated: ACM Assigned
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The SAP error message CMMFSA_SUB_ACCOUNT138 indicates that a subaccount cannot be invalidated because it is assigned to an Asset Class Management (ACM) object. This typically occurs in the context of financial accounting and asset management within SAP.
Cause: The error arises when you attempt to invalidate a subaccount that is currently linked to an asset class or is being used in transactions related to asset management. The system prevents the invalidation to maintain data integrity and ensure that all financial transactions are accurately recorded.
Solution: To resolve this error, you can follow these steps: Check Assignments: Verify if the subaccount is indeed assigned to any asset class or is being used in any active transactions. You can do this by checking the configuration settings in the Asset Accounting module. Unassign the Subaccount: If the subaccount is assigned to an asset class, you will need to unassign it. This may involve: Changing the asset class configuration to remove
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