diff --git a/IM/InfrastructureInfo.py b/IM/InfrastructureInfo.py
index ad7f7416a..7e3b7da99 100644
--- a/IM/InfrastructureInfo.py
+++ b/IM/InfrastructureInfo.py
@@ -306,17 +306,16 @@ def update_radl(self, radl, deployed_vms):
         """
 
         with self._lock:
-            # Add new networks only
-            for s in radl.systems + radl.networks + radl.ansible_hosts:
+            original_radl = self.radl.clone()
+            # Add new networks ad ansible_hosts only
+            for s in radl.networks + radl.ansible_hosts:
                 if not self.radl.add(s.clone(), "ignore"):
-                    InfrastructureInfo.logger.warn(
-                        "Ignoring the redefinition of %s %s" % (type(s), s.getId()))
+                    InfrastructureInfo.logger.warn("Ignoring the redefinition of %s %s" % (type(s), s.getId()))
 
-            # Add or update configures
+            # Add or update configures and systems
             for s in radl.configures + radl.systems:
                 self.radl.add(s.clone(), "replace")
-                InfrastructureInfo.logger.warn(
-                    "(Re)definition of %s %s" % (type(s), s.getId()))
+                InfrastructureInfo.logger.warn("(Re)definition of %s %s" % (type(s), s.getId()))
 
             # Append contextualize
             self.radl.add(radl.contextualize)
@@ -335,7 +334,12 @@ def update_radl(self, radl, deployed_vms):
                         self.private_networks[private_net] = d.cloud_id
 
         # Check the RADL
-        self.radl.check()
+        try:
+            self.radl.check()
+        except Exception as ex:
+            # If something is not correct restore the original one and raise the error
+            self.radl = original_radl
+            raise(ex)
 
     def complete_radl(self, radl):
         """
diff --git a/doc/source/conf.py b/doc/source/conf.py
index ef0c86c77..41e53ac7f 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -39,6 +39,7 @@
     'sphinx.ext.autodoc',
     'sphinx.ext.mathjax',
     'sphinx.ext.viewcode',
+    'sphinx.ext.graphviz'
 ]
 
 # Math
diff --git a/doc/source/xmlrpc.rst b/doc/source/xmlrpc.rst
index fafbd636a..7063ba077 100644
--- a/doc/source/xmlrpc.rst
+++ b/doc/source/xmlrpc.rst
@@ -62,6 +62,17 @@ This is the list of method names:
    Return the aggregated state associated to the 
    infrastructure with ID ``infId``. 
    
+   The ``state`` can be
+
+   * ``pending``, At least one VM is still in initialization stage;
+   * ``running``, All the VMs are created successfully and running, but at least one of them are still in the configuration stage;
+   * ``configured``, All the VMs are running and contextualized;
+   * ``unconfigured``, All the VMs are running but at least one of them are not correctly contextualized;
+   * ``stopped``, All the VMs are stopped or suspended;
+   * ``off``, All the VMs are shutdown or removed from the infrastructure;
+   * ``failed``, There are at least one VM in status ``failed``.
+   * ``unknown``, There are at least one VM in status ``unknown``.
+
 ``GetInfrastructureRADL``
    :parameter 0: ``infId``: integer
    :parameter 1: ``auth``: array of structs