How to use get_register_by_name api when register name is an array?

I have registers in register model with name ctrl_reg['h0], ctrl_reg['h1], etc.
when I call get_reg_by_name(“ctrl_reg['h0]”), null is returned and API is unable to find the register in the model.
How do I call such a register from model?

You should check how your registers are really named in your environment.
Execute simply get_registers(arg), then you get the real names.