diff --git a/apps/Moehlis-Faisst-Eckhart.py b/apps/Moehlis-Faisst-Eckhart.py
index e859290..3184c6e 100755
--- a/apps/Moehlis-Faisst-Eckhart.py
+++ b/apps/Moehlis-Faisst-Eckhart.py
@@ -210,6 +210,8 @@ def solve(u, dt, n):
     # produce and visualize data
     #    Moehlis-Faisst-Eckhart model
     #==========================================
+    if not os.path.exists('MFE'):
+        os.mkdir('MFE')
 
     dt  = 1.e-2
     mfe = MoehlisFaisstEckhart(Re = 800., Lx = 4.*np.pi, Lz = 2.*np.pi)
diff --git a/fds/slurm.py b/fds/slurm.py
index 17711b3..e5a0c35 100644
--- a/fds/slurm.py
+++ b/fds/slurm.py
@@ -22,9 +22,9 @@ class grab_from_SLURM_NODELIST:
     '''
     def __init__(self, num_nodes, lock_and_dict, exclude_this_node=False):
         if lock_and_dict is None:
-	    self.lock = None
-	else:
-	    self.lock, self.dict = lock_and_dict
+            self.lock = None
+        else:
+            self.lock, self.dict = lock_and_dict
         self.grab(num_nodes, exclude_this_node)
 
     def grab(self, num_nodes, exclude_this_node=False):