diff --git a/libs/utils/analysis_module.py b/libs/utils/analysis_module.py
index 987e213078b28ad6dba246fcadd336bd0fecd37e..da3ca6a73349300257809be1d8db8ac2081caf69 100644
--- a/libs/utils/analysis_module.py
+++ b/libs/utils/analysis_module.py
@@ -53,6 +53,9 @@ class AnalysisModule(object):
 
         if self._trace.has_big_little:
             self._little_cap = self._platform['nrg_model']['little']['cpu']['cap_max']
+
+        if ('big' in self._platform['clusters'] and
+            'little' in self._platform['clusters']):
             self._big_cpus = self._platform['clusters']['big']
             self._little_cpus = self._platform['clusters']['little']
 
diff --git a/libs/utils/env.py b/libs/utils/env.py
index 013f44f999ccc963f785caa9bdb1bb957a143cac..5ea783b1f426198e3dc846b6e95612434f5cff99 100644
--- a/libs/utils/env.py
+++ b/libs/utils/env.py
@@ -797,6 +797,9 @@ class TestEnv(ShareState):
         else:
             self.platform['nrg_model'] = self._load_em(self.conf['board'])
 
+        if self.platform['nrg_model'] is None:
+            del self.platform['nrg_model']
+
         # Adding topology information
         self.platform['topology'] = self.topology.get_level("cluster")