I am running a regcm4.3 simulation with only dust, but I don't know how to prepare the input data and its input dir for the dust run. I want to know if I only need download the EC-EARTH data for generating dust boundary condition or I need further.

I download the EC-EARTH/RF/2000 data for the dust run, and I set the dir same with NNRP2, such like this (SST SURFACE NNRP2 EC-EARTH/RF/2000), but when I run the ./chem_icbc step, the error is error open aeid file.