diff --git a/script/users/X-Treme users/XPS_Survey_Eph800eV.py b/script/users/X-Treme users/XPS_Survey_Eph800eV.py
index a9817e64..e49f5e67 100644
--- a/script/users/X-Treme users/XPS_Survey_Eph800eV.py	
+++ b/script/users/X-Treme users/XPS_Survey_Eph800eV.py	
@@ -7,6 +7,9 @@
 from ch.psi.pshell.data.LayoutDefault import ATTR_WRITABLE_DIMENSION as ATTR_WRITABLE_DIMENSION
 import org.jfree.chart.axis.NumberAxis as NumberAxis
 
+Class[] 
+{Double.class, Double.class, Integer.class}
+
 ##################
 PassE = 50.0
 PhotonE = 800.0