diff --git a/lib/kadeploy3/common/nodes.rb b/lib/kadeploy3/common/nodes.rb
index 3de212f4862f887b8a554f0aecc4377d53f3311e..165cc3d5872bbfd09d37741c973f212d2c2c67a4 100644
--- a/lib/kadeploy3/common/nodes.rb
+++ b/lib/kadeploy3/common/nodes.rb
@@ -286,6 +286,34 @@ module Nodes
       return numbers_array
     end
 
+    # Check two hostnames are close (the difference is only one number) 
+    #
+    # Arguments
+    # * hostname1 : string
+    # * hostname2 : string
+    #
+    # Output
+    # * return false if it is too remote 
+    def NodeSet::cmp_hosts(hostname1,hostname2)
+      close = true
+      i = 0
+      j = 0
+      array_host1 = separate_number_letter(hostname1)
+      array_host2 = separate_number_letter(hostname2)
+      if array_host1.length == array_host2.length
+        while close == true && i < array_host1.length
+          if array_host1[i] != array_host2[i] 
+            j += 1
+            close = false if (array_host1[i] =~ /[a-zA-Z\-\.]+/ || array_host2[i] =~ /[a-zA-Z\-\.]+/ || j>1) 
+          end
+          i+=1
+        end
+      else
+        close = false
+      end
+      return close
+    end
+
     private
 
     # Sort hostname
@@ -404,33 +432,6 @@ module Nodes
       return [[head] + [tail] + diff_array]
     end
 
-    # Check two hostnames are close (the difference is only one number) 
-    #
-    # Arguments
-    # * hostname1 : string
-    # * hostname2 : string
-    #
-    # Output
-    # * return false if it is too remote 
-    def NodeSet::cmp_hosts(hostname1,hostname2)
-      close = true
-      i = 0
-      j = 0
-      array_host1 = separate_number_letter(hostname1)
-      array_host2 = separate_number_letter(hostname2)
-      if array_host1.length == array_host2.length
-        while close == true && i < array_host1.length
-          if array_host1[i] != array_host2[i] 
-            j += 1
-            close = false if (array_host1[i] =~ /[a-zA-Z\-\.]+/ || array_host2[i] =~ /[a-zA-Z\-\.]+/ || j>1) 
-          end
-          i+=1
-        end
-      else
-        close = false
-      end
-      return close
-    end
 
     # find one remote host
     #
@@ -506,7 +507,7 @@ module Nodes
 
     private_class_method(:make_array_of_figures,
                          :make_array_of_hostnames, :separate_number_letter,
-                         :diff_hosts, :cmp_hosts, :remote_host_find,
+                         :diff_hosts,  :remote_host_find,
                          :numbers_fold, :nodes_group_list_fold)
 
     public
diff --git a/lib/kadeploy3/server/microsteps.rb b/lib/kadeploy3/server/microsteps.rb
index b5fee568b06d731d5007cea00efecf254d2cbaab..5654bd6bae4895bd4167a4a83613b7f84ac3a365 100644
--- a/lib/kadeploy3/server/microsteps.rb
+++ b/lib/kadeploy3/server/microsteps.rb
@@ -241,7 +241,7 @@ class Microstep < Automata::QueueTask
     end
   end
 
-  def command(cmd,opts={},_block)
+  def command(cmd,opts={},&_block)
     raise '@current_operation should not be set' if @current_operation
     @lock.synchronize{ @current_operation = Execute[cmd] }
     @current_operation.run(opts)