Which situation is NOT a valid reason for using Release mode?

Using Release mode in engineering contexts typically involves situations where precise control and safety are paramount. Each of the situations mentioned has different implications when it comes to safety and operational protocols.

Switching moves in non-CBTC (Communications-Based Train Control) yards and accepting a call-on at an interlocking signal are scenarios where strict adherence to signals and predetermined conditions is necessary to avoid potential accidents. These situations benefit from the implementation of Release mode as it allows for more controlled operations compared to other modes.

Conversely, emergency evacuations represent a scenario where the priority is immediate safety and rapid action. In such cases, the use of Release mode may not be suitable as it could introduce delays due to the controlled nature of the mode, which is not ideal in emergencies that require quick decisions and potentially unrestricted movement of vehicles.

Thus, using Release mode during emergency evacuations is inappropriate as it does not align with the urgent response needed in such critical situations while ensuring the fastest possible evacuation.