How to load replaybuffer in rlpyt/ul module？

[Gechenseu]

I am trying to load a replaybuffer.pkl file for the launch_dmc_ac_pretrain_1.py script in rlpyt/ul/experiments_for_rl/scripts/dmcontrol/launch_ul/. However, I found that there is no existing file, so I created an empty pkl-file. But now I'm getting an EOFError: Ran out of input error while executing pickle.load(fh). Does anyone know how to solve this issue?