In the callback routine, the function to start operation such as AioStartAi, AioStartAo etc. can not be described/executed.
On the other hand, in the event message routine, the function AioStartAi, AioStartAo etc. can be described/executed.
This is because the callback routine processing and the driver processing of event message routine are different.
If you want to execute the operation start function such as AioStartAi, AioStartAo etc. when an event occurs, please use the event message routine.