Hello, Abaqus pros

I'm trying to simulate Welding using DFLUX subroutine

Weldment_DFLUX file is input, and DFLUX_Code_4_Analysis is a user-defined Fortran file that I used for Body heat flux load.

I typed the following command via Abaqus Commander but it didn't go through well

abq2018 j=Weldment_DFLUX user=DFLUX_Code_4_Analysis cpus=16 interactive

What's causing the error?

and... are there any ways to simulate weldment without using subroutine?

Thank you

Je pyo Hong