Question: In UTRAN Iur interface RNSAP signalling, when a logical error occurs in a Class 1 procedure's request message without a specific outcome report message, how should the receiver proceed?
Option 1: Send a response with a Protocol Cause 'Semantic Error' and continue the procedure.
Option 2: Initiate the Error Indication procedure with an appropriate cause value, including relevant IEs for error identification, and terminate the procedure.
Option 3: Ignore the logical error and proceed with the next step in the procedure.
Option 4: Abort all ongoing procedures and restart the communication session.
Explanation: According to the specified behavior for Class 1 procedures where a logical error occurs in a request message without a specific outcome report, the receiver should terminate the procedure and initiate the Error Indication procedure. This includes providing an appropriate cause value and identifying the erroneous message via relevant error identification information, ensuring systematic error handling for potential recovery or further analysis.