Hi JunHwan,
As you mentioned your are using HIL402 device with configurations 5, which basically provides 2 cores for running converters and since one core can run a maximum weight of 3, you have sufficient core available to run both inverters. However, since 2 converters will use 2 cores, without core-coupling, you cannot compile the model since the processor is trying to run both converters on a single core. Hence, I recommend you to kindly use core coupling in the model preferably at a suitable point between the converters.
I also would suggest, since there is only a single machine block in your model, you can try to use configuration 1 of HIL402 also. With addition of core-coupling, your model will compile in configuration 1 as well.
In case, you still face any errors, try to share relevant files of the model, if possible, for better understanding.
Best Regards.