diff --git a/src/im_mad/im_sh/one_im_sh.rb b/src/im_mad/im_sh/one_im_sh.rb
index f93d55d6dc..8522b69ddb 100755
--- a/src/im_mad/im_sh/one_im_sh.rb
+++ b/src/im_mad/im_sh/one_im_sh.rb
@@ -68,7 +68,8 @@ class InformationManager < OpenNebulaDriver
             send_message("MONITOR", RESULT[:success], number, monitor_exe.stdout)
         else
             send_message("MONITOR", RESULT[:failure], number,
-                "Could not monitor host #{host}.")
+                "Could not monitor host #{host}. " +
+                "#{monitor_exe.get_error_message}")
         end
     end
 
diff --git a/src/im_mad/im_ssh/one_im_ssh.rb b/src/im_mad/im_ssh/one_im_ssh.rb
index 58f937bd3d..8c4a36fcc2 100755
--- a/src/im_mad/im_ssh/one_im_ssh.rb
+++ b/src/im_mad/im_ssh/one_im_ssh.rb
@@ -83,7 +83,7 @@ class InformationManager < OpenNebulaDriver
             send_message("MONITOR", RESULT[:success], number, cmd.stdout)
         else
             send_message("MONITOR", RESULT[:failure], number,
-                "Could not monitor host #{host}.")
+                "Could not monitor host #{host}. #{cmd.get_error_message}")
         end
     end
 
diff --git a/src/mad/ruby/VirtualMachineDriver.rb b/src/mad/ruby/VirtualMachineDriver.rb
index 500659892a..2a32245dae 100644
--- a/src/mad/ruby/VirtualMachineDriver.rb
+++ b/src/mad/ruby/VirtualMachineDriver.rb
@@ -121,7 +121,7 @@ class VirtualMachineDriver < OpenNebulaDriver
             info   = command_exe.stdout
         else
             result = :failure
-            info   = command_exe.stderr
+            info   = command_exe.get_error_message
         end
 
         info = "-" if info == nil || info.empty?