Abaqus RFEM analysis

Hi, I don't know if this is the right place to ask the following: I'm a student from Milano (Italy) and I would like to use Abaqus to run some random finite element analysis. I generated a permeabilty field through MatLab and tried to paste it into the .inp file, where permeability is required, but obviously it didn't work. Is that possible to run analysis editing parameters as I tried to do? Could anyone tell me something about it? Thanks a lot