diff --git a/script/RFscan/GunScan.py b/script/RFscan/GunScan.py
index 185d30a..49c74c4 100644
--- a/script/RFscan/GunScan.py
+++ b/script/RFscan/GunScan.py
@@ -35,7 +35,7 @@ dx =  Channel("SINEG01-DSCR190:DX-SIM", type = 'd', alias='SCR-DX')
 try:
     xb  = create_averager(x,  nb, 0.100)
     dxb = create_averager(dx, nb, 0.100)
-    r = lscan(phase, [xb, dxb], start, stop, step , latency=lat, after_read = after)
+    r = lscan(phase, [xb, dxb], start, stop, step , latency=lat)
     rf_phase = r.getPositions(0)
     E   = [val.mean/1000.0/disp*energy0 for val in r.getReadable(0)]
     dE  = [val.mean/1000.0/disp*energy0 for val in r.getReadable(1)]