In some cases, a processing workflow may not complete successfully due to an interruption or may be manually interrupted by the user.
If the workflow included a Seismic Loop in its structure, in the most of cases it's no need to rerun the whole dataset, Seismic Loop update the output dataset in the gather-by-gather way.
In the Seismic Loop Parameters tab, set First seq. gather to the next gather after the last successfully processed one (001 to 108, in the example), and keep Last seq. gather unchanged.
To avoid overwriting existing output, enable Append and disable Rewrite File in the Save Seismic settings, either in the Seismic Loop writing options or in the Save Seismic by Gather module. Processing will then continue from the specified gather and append results to the existing output.