Force the completion file to exist before the script

IPI_bombyx.py

@@ -72,6 +72,8 @@ def main(args):
     if os.path.isfile(outpath) and not args.erase:
         save.append(pd.read_hdf(outpath))
     df = pd.read_pickle(args.input)
+    if not os.path.isfile(args.done_file):
+        raise FileNotFoundError(f'Did not find the current completion file at {args.done_file}')
     done_file = open(args.done_file, 'a+')
     done_file.seek(0)
     file_list = [int(v) for v in done_file.read().split('\n') if len(v)]