diff --git a/paynt/synthesizer/decision_tree.py b/paynt/synthesizer/decision_tree.py
index f8720c38..13419ad6 100644
--- a/paynt/synthesizer/decision_tree.py
+++ b/paynt/synthesizer/decision_tree.py
@@ -110,10 +110,10 @@ def counters_print(self):
 
     def export_decision_tree(self, decision_tree, export_filename_base):
         tree = decision_tree.to_graphviz()
-        # tree_filename = export_filename_base + ".dot"
-        # with open(tree_filename, 'w') as file:
-        #     file.write(tree.source)
-        # logger.info(f"exported decision tree to {tree_filename}")
+        tree_filename = export_filename_base + ".dot"
+        with open(tree_filename, 'w') as file:
+            file.write(tree.source)
+        logger.info(f"exported decision tree to {tree_filename}")
 
         tree_visualization_filename = export_filename_base + ".png"
         tree.render(export_filename_base, format="png", cleanup=True) # using export_filename_base since graphviz appends .png by default
diff --git a/paynt/synthesizer/policy_tree.py b/paynt/synthesizer/policy_tree.py
index 89e22945..a249a2fe 100644
--- a/paynt/synthesizer/policy_tree.py
+++ b/paynt/synthesizer/policy_tree.py
@@ -792,7 +792,7 @@ def evaluate_all(self, family, prop, keep_value_only=False):
 
 
     def run(self, optimum_threshold=None):
-        return self.evaluate(export_filename_base=None)
+        return self.evaluate(export_filename_base=paynt.synthesizer.synthesizer.Synthesizer.export_synthesis_filename_base)
 
 
     def export_evaluation_result(self, evaluations, export_filename_base):
diff --git a/paynt/synthesizer/synthesizer_ar.py b/paynt/synthesizer/synthesizer_ar.py
index f09a412d..1af7788c 100644
--- a/paynt/synthesizer/synthesizer_ar.py
+++ b/paynt/synthesizer/synthesizer_ar.py
@@ -100,7 +100,7 @@ def update_optimum(self, family):
         self.quotient.specification.optimality.update_optimum(iv)
         self.best_assignment = ia
         self.best_assignment_value = iv
-        logger.info(f"value {round(iv,4)} achieved after {round(paynt.utils.timer.GlobalTimer.read(),2)} seconds")
+        # logger.info(f"value {round(iv,4)} achieved after {round(paynt.utils.timer.GlobalTimer.read(),2)} seconds")
         if isinstance(self.quotient, paynt.quotient.pomdp.PomdpQuotient):
             self.stat.new_fsc_found(family.analysis_result.improving_value, ia, self.quotient.policy_size(ia))