diff --git a/example/example_main.jl b/example/example_main.jl
index 855eea7..8193ae8 100644
--- a/example/example_main.jl
+++ b/example/example_main.jl
@@ -41,7 +41,6 @@ ops, data                       = Options(
     fitting                     = fitting_params(
         max_iter                = 10,
     ),
-    meta_data = Dict("ones" => ones(5))
 );
 
 # ==================================================================================================
diff --git a/src/genetic_ops.jl b/src/genetic_ops.jl
index 6ecb7da..04fbd76 100644
--- a/src/genetic_ops.jl
+++ b/src/genetic_ops.jl
@@ -207,16 +207,24 @@ function point_mutation2!(node, ops)
     node_elect = random_node(node, mode=0)
 
     if node_elect.ari == 2
-        node_elect.ari = 1
-        node_elect.ind = rand(1:length(ops.unaops))
-        if rand(Bool)
-            node_elect.lef = copy(node_elect.rig)
+        if !isempty(ops.unaops)
+            node_elect.ari = 1
+            node_elect.ind = rand(1:length(ops.unaops))
+            if rand(Bool)
+                node_elect.lef = copy(node_elect.rig)
+            end
+        else
+            point_mutation1!(node, ops)
         end
 
     elseif node_elect.ari == 1
-        node_elect.ari = 2
-        node_elect.ind = rand(1:length(ops.binops))
-        node_elect.rig = grow_equation(1, ops, method = :asym)
+        if !isempty(ops.binops)
+            node_elect.ari = 2
+            node_elect.ind = rand(1:length(ops.binops))
+            node_elect.rig = grow_equation(1, ops, method = :asym)
+        else
+            point_mutation1!(node, ops)
+        end
 
     elseif node_elect.ari == 0
         node_elect.ari = -1
diff --git a/src/nsga-II.jl b/src/nsga-II.jl
index 86eea11..48988bc 100644
--- a/src/nsga-II.jl
+++ b/src/nsga-II.jl
@@ -275,7 +275,7 @@ function generational_loop(
             if ops.general.print_progress
                 display(cur_prog_dict)
                 # println("\n", round(Int64, t_since ÷ 60), " min  ", round(Int64, t_since % 60), " sec | type :q and enter to finish early")
-                println("\n", round(Int64, t_since ÷ 60), " min  ", round(Int64, t_since % 60))
+                println("\n", round(Int64, t_since ÷ 60), " min  ", round(Int64, t_since % 60), " sec")
             end
 
             if ops.general.plot_hall_of_fame
@@ -399,7 +399,7 @@ function generational_loop(
     if ops.general.print_progress
         display(cur_prog_dict)
         # println("\n", round(Int64, t_since ÷ 60), " min  ", round(Int64, t_since % 60), " sec | type :q and enter to finish early")
-        println("\n", round(Int64, t_since ÷ 60), " min  ", round(Int64, t_since % 60))
+        println("\n", round(Int64, t_since ÷ 60), " min  ", round(Int64, t_since % 60), " sec")
     end
 
 # ==================================================================================================