diff --git a/swash/processing/animate.py b/swash/processing/animate.py
index 1162399..2717140 100644
--- a/swash/processing/animate.py
+++ b/swash/processing/animate.py
@@ -22,7 +22,7 @@ config.read(args.config)
 inp = pathlib.Path(config.get("post", "inp"))
 root = pathlib.Path(config.get("swash", "out"))
 out = pathlib.Path(config.get("plot", "out"))
-out.mkdir(exist_ok=True)
+out.mkdir(parents=True, exist_ok=True)
 
 
 def data(var):
diff --git a/swash/processing/layers.py b/swash/processing/layers.py
index e2d2f05..81c8f83 100644
--- a/swash/processing/layers.py
+++ b/swash/processing/layers.py
@@ -22,7 +22,7 @@ config.read(args.config)
 inp = pathlib.Path(config.get("post", "inp"))
 root = pathlib.Path(config.get("swash", "out"))
 out = pathlib.Path(config.get("plot", "out"))
-out.mkdir(exist_ok=True)
+out.mkdir(parents=True, exist_ok=True)
 
 
 def data(var):
diff --git a/swash/processing/read_swash.py b/swash/processing/read_swash.py
index 8a983b7..8197bca 100644
--- a/swash/processing/read_swash.py
+++ b/swash/processing/read_swash.py
@@ -13,7 +13,7 @@ class ReadSwash:
 
     @classmethod
     def read_nohead(cls, path):
-        subprocess.run(("sed", "-i", r"s/ /\n/g", path))
+        subprocess.run(("sed", "-i", r"s/\s\+/\n/g", path))
         return np.loadtxt(path)
 
     def read_time(self, path):
diff --git a/swash/processing/sws_npz.py b/swash/processing/sws_npz.py
index 3c971ab..31a1f5e 100644
--- a/swash/processing/sws_npz.py
+++ b/swash/processing/sws_npz.py
@@ -40,7 +40,7 @@ var = {
 }
 
 inp.mkdir(exist_ok=True)
-with ThreadPool() as pool:
+with ThreadPool(len(var)) as pool:
     log.info("Converting all data")
     pool.map(
         lambda x: np.save(