Message type: E = Error
Message class:  TU - Billing/Scheduling/Budget Billing 
Message number: 581
Message text: You cannot change currency &1 in event R950
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The SAP error message TU581, which states "You cannot change currency &1 in event R950," typically occurs in the context of currency management within SAP, particularly when dealing with financial transactions or master data that involve currency settings.
Cause: The error is triggered when there is an attempt to change the currency of a transaction or master data that is not allowed due to the current settings or status of the data. This can happen in various scenarios, such as: Currency Locking: The currency might be locked for changes due to specific business rules or configurations. Transaction Status: The transaction or document may be in a status that does not permit changes to the currency. Event R950: This event is related to the processing of currency changes, and if the system detects that a currency change is not permissible at this stage, it will throw this error.
Solution: To resolve the TU581 error, consider the following steps: Check
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