Question: When is the Error Indication procedure in UTRAN Iu interface RANAP signalling likely to use connection-oriented signalling?
Option 1: When errors are detected in incoming messages utilizing dedicated signalling.
Option 2: When the error situation arises from reception of a message using common signalling channels.
Option 3: During handover procedures between different Radio Access Technologies (RATs).
Option 4: For periodic reporting of system health checks.
Explanation: According to RANAP signalling principles, connection-oriented signalling is used for the Error Indication procedure when the error situation arises from the reception of a message that utilizes dedicated signalling. This is because dedicated signalling implies an established connection, hence the use of connection-oriented signalling for error reporting.