diff --git a/tools/parse_all.py b/tools/parse_all.py
index 7415113..5d4410b 100644
--- a/tools/parse_all.py
+++ b/tools/parse_all.py
@@ -17,6 +17,7 @@ config = configparser.ConfigParser()
 config.read("tools.cfg")
 INDIR = Path(config["tools"]["kres_orig"])
 OUTDIR = Path(config["tools"]["kres_tsv"])
+CPU_CORES = int(config["tools"]["cpu_cores"])
 
 LOGFILE = Path(config["tools"]["logfile"]).absolute()
 LOGFILE.touch(exist_ok=True)
@@ -32,27 +33,38 @@ ssj_dict = par.parse_tei(ssj_file)
 print("end parsing ssj")
 """
 
-logging.info("parsing kres")
 # kres_file = "../data/kres_example/F0019343.xml.parsed.xml"
 OUTDIR.mkdir(exist_ok=True)
 
 infiles = list(enumerate([x for x in INDIR.iterdir() if x.is_file()]))
+logging.info("Parsing kres: {} files.".format(len(infiles)))
 
 def handle_file(infile):
     i = infile[0]
     kres_file = infile[1]
+    outfile = (OUTDIR / kres_file.name).with_suffix(".tsv")
 
-    logging.info("Processing file ({}/{}): {}".format(i+1, len(infiles), str(kres_file)))
-    res_dict = par.parse_tei(kres_file)
-    kres_out_str = ""
+    if outfile.is_file():
+        logging.info("Skipping existing file: {}.".format(str(kres_file)))
+        return True
 
-    for _, sentence in res_dict.items():
-        kres_out_str += par.to_conll_2009_SRL(sentence)
+    try:
+        res_dict = par.parse_tei(kres_file)
+        kres_out_str = ""
+        for _, sentence in res_dict.items():
+            kres_out_str += par.to_conll_2009_SRL(sentence)
+    except:
+        logging.info("Failed processing file: {}".format(str(kres_file)))
+        return False
 
-    with (OUTDIR / kres_file.name).with_suffix(".tsv").open("wb+") as fp:
+
+    with outfile.open("wb+") as fp:
         fp.write(kres_out_str.encode("utf-8"))
+        logging.info("Processed file ({}/{}): {}".format(i+1, len(infiles), str(kres_file)))
+        return True
+    return False
 
-with Pool(3) as p:
+with Pool(CPU_CORES) as p:
     p.map(handle_file, infiles)
 
 
diff --git a/tools/tools.cfg b/tools/tools.cfg
index 9f32788..2751d43 100644
--- a/tools/tools.cfg
+++ b/tools/tools.cfg
@@ -4,4 +4,5 @@ kres_tsv = ../data/kres_out/1_tsv
 kres_srl = ../data/kres_out/2_srl
 kres_json = ../data/kres_out/final_json
 logfile = ../progress.log
+cpu_cores = 5
 debug = False