Index: wflow/wflow_topoflex.py
===================================================================
diff -u -ra9498adee6baab0a0abaa331041be8948510167b -r327cf67207b7d3dfb5a3fecab60c9706a313f1f5
--- wflow/wflow_topoflex.py	(.../wflow_topoflex.py)	(revision a9498adee6baab0a0abaa331041be8948510167b)
+++ wflow/wflow_topoflex.py	(.../wflow_topoflex.py)	(revision 327cf67207b7d3dfb5a3fecab60c9706a313f1f5)
@@ -16,13 +16,24 @@
 
 """
 
+import wflow.reservoir_Si as reservoir_Si
+import wflow.reservoir_Sa as reservoir_Sa
+import wflow.reservoir_Sw as reservoir_Sw
+import wflow.reservoir_Su as reservoir_Su
+import wflow.reservoir_Sf as reservoir_Sf
+import wflow.reservoir_Ss as reservoir_Ss
+import wflow.JarvisCoefficients as JarvisCoefficients
+
+
 import os.path
 from copy import deepcopy as copylist
 
 import pcraster.framework
 from wflow.wf_DynamicFramework import *
 from wflow.wflow_adapt import *
 
+import pcraster as pcr
+
 # TODO: see below
 """
 Verwijderen IRURFR_L statements?
@@ -1281,7 +1292,7 @@
         self.PrecipTotal = (
             self.Precipitation
         )  # NB: self.PrecipTotal is the precipitation as in the inmaps and self.Precipitation is in fact self.Rainfall !!!!
-        if self.selectSw[0] > 0:
+        if self.selectSw[0] is not None:
             self.Precipitation = pcr.ifthenelse(
                 self.Temperature >= self.Tt[0], self.PrecipTotal, 0
             )