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Trouble with Setup

Hi all!

I am trying to run CAM5-MAM7 and and customize the chemical mechanism.
For this reason I have copied the file chem_mech.in to my home (without making any modification yet) and I have specified in env_buil.xml -usr_chem_infile = / path / chem_mech_test.in
Clarification: the only thing I've done is modify this in the env_buil.xml, in the mechanism I have not changed anything.
However once I run ./cesm_setup -clean and then ./cesm_setup
I get the following error:Creating batch script MAM7_test5.run
Locking file env_mach_pes.xml
Running preview_namelist script
 infile is /home/abossolasco/cesm1_2_2/scripts/MAM7_test5/Buildconf/cplconf/cesm_namelist
**** ERROR ****
  ChemPreprocess::get_species_list cannot find /home/abossolasco/cesm1_2_2/scripts/MAM7_test5/Buildconf/camconf/chem_proc/source
ERROR: cam.buildnml.csh failed
ERROR: /home/abossolasco/cesm1_2_2/scripts/MAM7_test5/preview_namelists failed: 25344


Any idea what this happen??? I don't understand because I just modified the env_buil.xml. I really appreciate any help
Cheers! 
 
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