diff --git a/models/ModelBase.py b/models/ModelBase.py
index 35e00ca..9f41798 100644
--- a/models/ModelBase.py
+++ b/models/ModelBase.py
@@ -296,8 +296,8 @@ class ModelBase(object):
 
     def ask_target_iter(self, default_value=0):
         if io.get_default_answer('NonInteractiveMode') is not None:
-                  default_target_iter = self.load_or_def_option('target_iter', default_value + io.get_default_answer('target_iter_increment'))
-                  self.options['target_iter'] = max(0, default_target_iter + io.get_default_answer('target_iter_increment'))
+                  default_target_iter = self.load_or_def_option('target_iter', default_value + int(io.get_default_answer('target_iter_increment')))
+                  self.options['target_iter'] = max(0, default_target_iter + int(io.get_default_answer('target_iter_increment')))
                   print("TARGET ITERATION: " + str(self.options['target_iter']))
         else:
                     default_target_iter = self.load_or_def_option('target_iter', default_value)