Message type: E = Error
Message class:  SV - View Maintenance: Customize Messages 
Message number: 708
Message text: You must specify a transport request for background processing.
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 SV708, "You must specify a transport request for background processing," typically occurs when you are trying to execute a background job or a program that requires a transport request, but one has not been specified. This is common in scenarios where changes are being made to objects that need to be transported between different SAP systems (e.g., from development to quality assurance or production).
Cause: Missing Transport Request: The most common cause of this error is that the user has not specified a transport request when trying to execute a program or job that requires one. Background Processing: The system expects a transport request to be associated with the changes being made, especially when these changes are related to development objects. User Authorization: Sometimes, the user may not have the necessary authorizations to create or assign a transport request.
Solution: To resolve the SV708 error, you can follow these steps: Specify a Transport
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