I see on line 298 of the Test Driver executable you’ve attached that you have
cmd1=‘cb-kim.x < opt.in > opt.out’
This is the cause of the error, since opt.in is under the ‘output’ directory. Try changing it to
cmd1=‘cb-kim.x < output/opt.in > output/opt.out’
and let me know if this resolves the issue. Notice I’ve also directed opt.out into the output directory so that it’s copied into the final Test Result directory. Any files that are not copied into ‘output’ will be deleted after the Test-Model pair has finished running. I would say it’s usually good practice to keep a copy of the final input/output files that are used by a Test in the Test Result directory, although if the files are extremely large this could be impractical.