To restart the code from a restart file, it is best to first copy the restart file that will be used to restart.rst.
If a file named restart.rst does not exist, CONVERGE will use the highest numbered restart file. Set restart_flag = 1 in inputs.in (in CONVERGE 2.4; this parameter is rstrtflg in CONVERGE 2.3 and earlier). You can instruct CONVERGE to append a unique number to the output files generated from the restarted simulation by setting restart_number in inputs.in (in CONVERGE 2.4; this parameter is rstrtnum in CONVERGE 2.3 and earlier) to the desired numeric value. Finally, start the code as described in the Running in Serial section (e.g., converge > log.out &).