diff --git a/src/SimNDT/core/simulation.py b/src/SimNDT/core/simulation.py
index 3d67ccd..4aa0ff4 100644
--- a/src/SimNDT/core/simulation.py
+++ b/src/SimNDT/core/simulation.py
@@ -50,7 +50,7 @@ class Simulation:
         self.TimeSteps = 0
 
     def job_parameters(self, materiales, transducer):
-
+        self.Materials=materiales
         indVL = [mat.VL for mat in materiales if mat.VL > 400]
         indVT = [mat.VT for mat in materiales if mat.VT > 400]