Message type: E = Error
Message class:  RSLPO_DFG - Messages for Data-Flow Generation 
Message number: 151
Message text: 'Only Retrieve Last Request' (='&1') is consistent
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The SAP error message RSLPO_DFG151, which states "Only Retrieve Last Request" (='&1') is consistent, typically occurs in the context of data extraction or data loading processes, particularly when working with SAP BW (Business Warehouse) or SAP Data Services. This error indicates that the system is trying to retrieve data from a request that is not the most recent one, which is not allowed in certain scenarios.
Cause: Request Consistency: The error usually arises when there is an attempt to retrieve data from a request that is not the last one processed. In SAP BW, data requests are often processed in a sequence, and only the most recent request can be accessed for certain operations. Data Load Issues: If there are issues with data loads or if the data model has been changed, it may lead to inconsistencies in the requests. Data Source Configuration: The configuration of the data source or the InfoProvider may restrict
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