linc config generator error

[JacqueCC]

When I give the command ./config_generator topology.json sys.config.template 10.31.1.124 6653 in the terminal on the mininet vm I get the following error message. Do you know why?

mininet@mininet-vm:~/LINC-config-generator$ ./config_generator topology.json sys.config.template 10.31.1.124 6653
escript: exception error: no match of right hand side value {error,enoent}
in function config_generator:parse/4 (src/config_generator.erl, line 45)
in call from escript:run/2 (escript.erl, line 752)
in call from escript:start/1 (escript.erl, line 276)
in call from init:start_it/1
in call from init:start_em/1