diff --git a/src/CashFlow_ExtMod.py b/src/CashFlow_ExtMod.py
index 4dbc30808..d4ffe4dd4 100644
--- a/src/CashFlow_ExtMod.py
+++ b/src/CashFlow_ExtMod.py
@@ -173,7 +173,7 @@ def __init__(self):
   myInputs = {}
   with open(inpOpt.iINP[0]) as f:
     for l in f:
-      if l.strip().startswith("#"):
+      if l.strip().startswith("#") or not len(l.strip()):
         continue
       (key, val) = l.split(' ', 1)
       myInputs[key] = np.array([float(n) for n in val.split(",")])