To install DustemWrap on your machine: 1/ If you do not have IDL, install GDL from https://github.com/gnudatalanguage/gdl/wiki 2/ If not already done, download dustem4.3_wk (https://owncloud.ias.u-psud.fr/index.php/s/AoFA2bzBwcQzmEK) Note that 5/ assumes that you have put the above in $HOME/Soft_Libraries/dustem4.3_wk 3/ set CHARACTER (len=100) :: data_path=’/tmp/Dustem/’ in Fortran file $HOME/Soft_Libraries/dustem4.3_wk/src/DM_constants.f90 compile the fortran dustem : cd $HOME/Soft_Libraries/dustem4.3_wk/src make clean make 4/ get the DustemWrap IDL/GDL code from https://gitlab.irap.omp.eu/OV-GSO-DC/dustem-wrapper_idl.git Note that 5/ assumes that you have installed the above in $HOME/Soft_Libraries/dustem-wrapper_idl 5/ copy the files idl_startup_sample and/or gdl_startup_sample from $HOME/Soft_Libraries/dustem-wrapper_idl to your home directory and rename into idl_startup and/or gdl_startup (if you already have your own startup files, you may want to save those somewhere else) If your directory tree is different from described in 2/ and 4/, modify idl_startup and/or gdl_startup accordingly. 6/ open idl or gdl and type dustem_run_readme if successful type dustem_fit_sed_readme