Message type: E = Error
Message class:  RSO_RES_QMSGS - Messages directly related to Query Designer. 
Message number: 081
Message text: Requested hierarchy is not available: &1
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The SAP error message RSO_RES_QMSGS081 indicates that a requested hierarchy is not available in the system. This error typically occurs in the context of reporting or data extraction when the system cannot find the specified hierarchy for a characteristic or dimension.
Cause: Hierarchy Not Defined: The hierarchy you are trying to access has not been defined in the system. Hierarchy Not Active: The hierarchy exists but is not active or has been deactivated. Incorrect Hierarchy Name: There may be a typo or incorrect reference to the hierarchy name in your query or report. Authorization Issues: The user may not have the necessary authorizations to access the hierarchy. Transport Issues: If the hierarchy was recently transported from another system, it may not have been properly imported or activated.
Solution: Check Hierarchy Definition: Go to the relevant transaction (e.g., RSH1 for creating hierarchies) and verify that the hierarchy exists and is correctly defined. Activate Hierarchy: If the hierarchy is defined but not active,
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