megatron_lm_ckpt_to_nemo.py  and the hparams.yaml
The example at the top of megatron_lm_ckpt_to_nemo.py  sugests that you can convert the megatron-lm checkpoint without hparams.yaml file. I did not spend huge amount of time trying to understand this code but its seems not possible and the only reason why hparams is not a manadatory argument seems to be because one can optionally pass cnf via kwargs.

Could we add literally one sentence describing that in the top of the file preferably also providing an example of a yaml file - happy to send out working 5B example for GPT.