Message type: E = Error
Message class:  RSDU_REPART - Messages for Repartitioning InfoProviders 
Message number: 007
Message text: There is no open conversion request yet
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
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The SAP error message RSDU_REPART007 ("There is no open conversion request yet") typically occurs in the context of data warehousing, particularly when working with the SAP BW (Business Warehouse) system. This error indicates that the system is trying to access or process a conversion request that has not been created or is not currently open.
Causes:
No Active Conversion Request: The most common cause is that there is no active or open conversion request for the data source you are trying to work with.
Data Source Configuration: The data source may not be properly configured, or the extraction process has not been initiated.
Process Chain Issues: If you are running a process chain, it may not have executed successfully, leading to the absence of an open conversion request.
Authorization Issues: Sometimes, the user may not have the necessary authorizations to view or access the conversion requests.
Solutions:
Check for Open Conversion Requests:
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