diff --git a/script/Vinayak_prot.py b/script/Vinayak_prot.py
index 32154cc..b0ac545 100644
--- a/script/Vinayak_prot.py
+++ b/script/Vinayak_prot.py
@@ -5,7 +5,7 @@ while (flag):
     caput(X11MA-PC-LEEM:DIG-CH5,0)
     a = caget(X11MA-PC-LEEM:DIG-CH5-ACK)
     if a == ACK : 
-        b = 0
+        flag = 0
     time.sleep(1.0)
 
 flag = 1
@@ -50,7 +50,7 @@ while (flag):
     caput(X11MA-PC-LEEM:DIG-CH4,0)
     a = caget(X11MA-PC-LEEM:DIG-CH4-ACK)
     if a == ACK : 
-        b = 0
+        flag = 0
     time.sleep(1.0)
 
 flag = 1