diff --git a/hp4155/ADU for double gate devices/lib/measurements.py b/hp4155/ADU for double gate devices/lib/measurements.py
index 5095055ea67bfd47bf4c4324fd9c7d361bfa3204..7593b91122f40e6b7c876c36126d050e3001e977 100644
--- a/hp4155/ADU for double gate devices/lib/measurements.py	
+++ b/hp4155/ADU for double gate devices/lib/measurements.py	
@@ -774,8 +774,8 @@ def Output_BOTH(VDS,VTG,VBG,integration,sample,device):
     device.setup_var2(var2)
     
 
-    points_VBG = number_of_points(VTG)
-    values_VBG = np.linspace(VBG["start"].value,VBG["stop"].value,num = points_VTG,endpoint= True)
+    points_VBG = number_of_points(VBG)
+    values_VBG = np.linspace(VBG["start"].value,VBG["stop"].value,num = points_VBG,endpoint= True)
 
     device.integration_time(integration)
     device.display_variable('X','VDS')