Message type: E = Error
Message class:  TR_AUSL - Software Delivery Composer Messages 
Message number: 257
Message text: Select lines with flagged change requests only
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The SAP error message TR_AUSL257, which states "Select lines with flagged change requests only," typically occurs in the context of transport requests and change management in SAP systems. This error indicates that the system expects you to select only those lines that are associated with flagged change requests when performing certain operations, such as releasing or managing transport requests.
Cause: Incorrect Selection: The user may have selected lines that do not have a flagged change request associated with them. The system is designed to only allow operations on those items that are marked for transport. Transport Request Status: The transport request may not be in the correct status (e.g., it might be in a status that does not allow for the operation being attempted). Missing Flagging: The objects or changes you are trying to transport may not have been properly flagged for transport.
Solution: Review Selections: Ensure that you are only selecting lines that are associated
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