diff --git a/demos_and_examples/example_26en_dynamic_traffic_assignment_DUO_DUE_DSO.py b/demos_and_examples/example_26en_dynamic_traffic_assignment_DUO_DUE_DSO.py
index 6472ed8..a3e8605 100644
--- a/demos_and_examples/example_26en_dynamic_traffic_assignment_DUO_DUE_DSO.py
+++ b/demos_and_examples/example_26en_dynamic_traffic_assignment_DUO_DUE_DSO.py
@@ -5,6 +5,8 @@
 - Dynamic System Optimum (DSO)
 """
 
+'''temporally disabled due to unknown random error.
+
 from pylab import *
 import uxsim
 from uxsim.DTAsolvers import *
@@ -103,4 +105,5 @@ def create_World():
 
 solver_DSO.plot_convergence()
 solver_DSO.plot_link_stats()
-solver_DSO.plot_vehicle_stats(orig="4", dest="7")
\ No newline at end of file
+solver_DSO.plot_vehicle_stats(orig="4", dest="7")
+'''
\ No newline at end of file