diff --git a/LDDsimulation.py b/LDDsimulation.py
index 5f2a8541fdf1f20216cdc06f5208ff6272ff1460..1a0d6c9c7465ae323ab080ac1cc38c849c639120 100644
--- a/LDDsimulation.py
+++ b/LDDsimulation.py
@@ -117,7 +117,7 @@ class LDDsimulation(object):
         Public method to call all the init methods of the LDD simulation.
         """
         if not self._parameters_set:
-            raise RuntimeError("You forgott to run self.set_parameters(**kwds)")
+            raise RuntimeError('Parameters note set!\nYou forgott to run self.set_parameters(**kwds)')
         self._init_meshes_and_markers()
         self._init_interfaces()
         self._init_subdomains()