It may happen in LAB5, when you modify the TRNXX.Container.Status_Process operation, that the operation property "Interface" tab will have both the ContainerStatus and New_Status inputs.

In this case, refresh the inputs, so that the ContainerStatus one disappears.

If you set the External Input option on the ChangeContainerStatus, the ContainerStatus input will be created automatically, and it sometimes does not get deleted after you change it to New_Status.

If the ContainerStatus input stays, it will cause the Operation to crash.

Refreshing the inputs on the Interface operation property tab will make sure this will work properly.