diff --git a/flamapy/metamodels/bdd_metamodel/models/bdd_model.py b/flamapy/metamodels/bdd_metamodel/models/bdd_model.py
index 4258a33..91c472e 100644
--- a/flamapy/metamodels/bdd_metamodel/models/bdd_model.py
+++ b/flamapy/metamodels/bdd_metamodel/models/bdd_model.py
@@ -130,19 +130,25 @@ def expand_assignment(bdd_file: str, feature_assignment: list[str]) -> list[str]
         # Get all feature names
         with open(bdd_file, 'r', encoding='utf8') as file:
             bdd_code = file.read()
-            varnames = re.search('varnames\\s+(.*)', bdd_code).group(1).split()
+            varnames_match = re.search(r'varnames\s+(.*)', bdd_code)
+            if not varnames_match:
+                raise FlamaException('No varnames found in the BDD file.')
+            varnames = varnames_match.group(1).split()
 
         expanded_assignment = []
         for feature in feature_assignment:
             feat = None
-            if re.match('not\\s+', feature):
-                feat = re.search('not\\s+(.*)', feature).group(1)
-                if varnames.count(feat) == 0:
-                    raise FlamaException(f'{feat} is not a valid feature of {bdd_file}')
-                feat += "=false"
+            if re.match(r'not\s+', feature):
+                feat_match = re.search(r'not\s+(.*)', feature)
+                if feat_match:
+                    feat = feat_match.group(1)
+                    if varnames.count(feat) == 0:
+                        raise FlamaException(f'{feat} is not a valid feature of {bdd_file}')
+                    feat += "=false"
             else:
                 if varnames.count(feature) == 0:
                     raise FlamaException(feature + " is not a valid feature of " + bdd_file)
                 feat = feature + "=true"
-            expanded_assignment.append(feat)
+            if feat:
+                expanded_assignment.append(feat)
         return expanded_assignment
diff --git a/flamapy/metamodels/bdd_metamodel/operations/bdd_configurations_number.py b/flamapy/metamodels/bdd_metamodel/operations/bdd_configurations_number.py
index 85c2adb..b389f8d 100644
--- a/flamapy/metamodels/bdd_metamodel/operations/bdd_configurations_number.py
+++ b/flamapy/metamodels/bdd_metamodel/operations/bdd_configurations_number.py
@@ -48,7 +48,7 @@ def configurations_number(bdd_model: BDDModel,
     return result
 
 
-def count(bdd_model: BDDModel, feature_assignment: list[str] = None) -> int:
+def count(bdd_model: BDDModel, feature_assignment: Optional[list[str]] = None) -> int:
     """
     Computes the number of valid configurations.
         :param feature_assignment: a list with a partial or a complete features' assignment
diff --git a/flamapy/metamodels/bdd_metamodel/operations/bdd_feature_inclusion_probability.py b/flamapy/metamodels/bdd_metamodel/operations/bdd_feature_inclusion_probability.py
index 80085aa..37c4a71 100644
--- a/flamapy/metamodels/bdd_metamodel/operations/bdd_feature_inclusion_probability.py
+++ b/flamapy/metamodels/bdd_metamodel/operations/bdd_feature_inclusion_probability.py
@@ -54,7 +54,8 @@ def execute(self, model: VariabilityModel) -> 'BDDFeatureInclusionProbability':
 
 def feature_inclusion_probabilities(bdd_model: BDDModel, 
                                     precision: int,
-                                    partial_configuration: Optional[Configuration] = None) -> int:
+                                    partial_configuration: Optional[Configuration] = None
+                                    ) -> dict[Any, float]:
     """
     Computes the featue inclusion probabilities.
         :param feature_assignment: a list with a partial or a complete features' assignment
diff --git a/requirements.txt b/requirements.txt
index 9cc7eb2..4ff5900 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-flamapy-fw==2.0.0.dev6
-flamapy-fm==2.0.0.dev6
\ No newline at end of file
+flamapy-fw==2.0.0
+flamapy-fm==2.0.0
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 2e84731..3c5223e 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ def read_requirements(file):
 
 setuptools.setup(
     name="flamapy-bdd",
-    version="2.0.0.uned.dev1",
+    version="2.0.0.post1",
     author="Flamapy",
     author_email="flamapy@us.es",
     description="bdd-plugin for the automated analysis of feature models",