There is an Error while using VirtualBOX and TwinCAT Runtime.
Setting TwinCat in Run Mode on sharded core(s) inside Virtual Box(Virtual machine) is not possible.
Double Click System>Real-Time.
Press “Read from Target”.
This is an operation to let TwinCAT read your PC configurations.
In my Operation system, there are 2 cores.
And Then I set Core1 as a RT-Core.
Presse “Set on Target”.
TwinCAT software will ask which core is your shared cores.
Download the Configuration again and start the run-time.
If the status is changed to Green, it means that your run-time is running in normal.