diff --git a/invoice.py b/invoice.py
index 3340340..2fe3bd6 100644
--- a/invoice.py
+++ b/invoice.py
@@ -1,10 +1,10 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-from trytond.pool import Pool, PoolMeta
-from trytond.model import ModelView, ModelSQL, fields
+from trytond.pool import PoolMeta
+from trytond.model import fields
 from trytond.pyson import Eval
+from trytond.model.exceptions import ValidationError
 
-from trytond.exceptions import UserError
 
 class Invoice(metaclass=PoolMeta):
     'Account Invoice'
@@ -12,28 +12,31 @@ class Invoice(metaclass=PoolMeta):
 
     _states = {
         'readonly': Eval('state') != 'draft',
-        }
+    }
+
+    account_analytic = fields.Many2One(
+        'analytic_account.account', 'Analytic Account',
+        domain=[('type', '=', 'normal')],
+        states=_states)
 
 
-    account_analytic = fields.Many2One('analytic_account.account', 'Analytic Account',
-                                       domain=[('type', '=', 'normal')],
-                                       states=_states)
-
-    
 class InvoiceLine(metaclass=PoolMeta):
-      'Invoice Line'
-      __name__ = 'account.invoice.line'
-
-      @fields.depends('product', 'unit', '_parent_invoice.type', 'analytic_accounts',
-                      '_parent_invoice.party', 'party', 'invoice', 'invoice_type',
-                      '_parent_invoice.account_analytic', '_parent_invoice.invoice_date',
-                      '_parent_invoice.accounting_date','company', methods=['_get_tax_rule_pattern'])
-      def on_change_product(self):
-          super(InvoiceLine, self).on_change_product()
-          self.analytic_accounts = tuple()
-          try:
-              self.analytic_accounts += ({'root': self.invoice.account_analytic.root,
-                                          'account': self.invoice.account_analytic},) 
-          except:
-              pass
+    'Invoice Line'
+    __name__ = 'account.invoice.line'
 
+    @fields.depends(
+        'product', 'unit', '_parent_invoice.type', 'analytic_accounts',
+        '_parent_invoice.party', 'party', 'invoice', 'invoice_type',
+        '_parent_invoice.account_analytic', '_parent_invoice.invoice_date',
+        '_parent_invoice.accounting_date', 'company',
+        methods=['_get_tax_rule_pattern'])
+    def on_change_product(self):
+        super(InvoiceLine, self).on_change_product()
+        self.analytic_accounts = tuple()
+        try:
+            if self.invoice and self.invoice.account_analytic:
+                self.analytic_accounts += (
+                    {'root': self.invoice.account_analytic.root,
+                     'account': self.invoice.account_analytic},)
+        except Exception as e:
+            raise ValidationError(f"Se produjo un error: {e}")
diff --git a/purchase.py b/purchase.py
index 5454878..12a3477 100644
--- a/purchase.py
+++ b/purchase.py
@@ -1,10 +1,10 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-from trytond.pool import Pool, PoolMeta
-from trytond.model import ModelView, ModelSQL, fields
+from trytond.pool import PoolMeta
+from trytond.model import fields
 from trytond.pyson import Eval
+from trytond.model.exceptions import ValidationError
 
-from trytond.exceptions import UserError
 
 class Purchase(metaclass=PoolMeta):
     'Purchase Analytic Operation'
@@ -12,20 +12,25 @@ class Purchase(metaclass=PoolMeta):
 
     _states = {
         'readonly': Eval('state') != 'draft',
-        }
+    }
+
+    account_analytic = fields.Many2One(
+        'analytic_account.account', 'Analytic Account', required=True,
+        domain=[('type', '=', 'normal')],
+        states=_states)
+
 
-    account_analytic = fields.Many2One('analytic_account.account', 'Analytic Account', required=True,
-                                       domain=[('type', '=', 'normal')],
-                                       states=_states)
 class PurchaseLine(metaclass=PoolMeta):
     'Purchase Line Analytic Operation'
-    __name__ =  'purchase.line'
+    __name__ = 'purchase.line'
 
-    @fields.depends('product', 'unit', 'purchase',
+    @fields.depends(
+        'product', 'unit', 'purchase',
         '_parent_purchase.party', '_parent_purchase.invoice_party',
         '_parent_purchase.account_analytic', 'product_supplier',
-        'analytic_accounts', methods=['compute_taxes', 'compute_unit_price',
-                                     '_get_product_supplier_pattern'])
+        'analytic_accounts',
+        methods=['compute_taxes', 'compute_unit_price',
+                 '_get_product_supplier_pattern'])
     def on_change_product(self):
         if not self.product:
             return
@@ -43,7 +48,7 @@ class PurchaseLine(metaclass=PoolMeta):
             self.unit = self.product.purchase_uom
 
         product_suppliers = list(self.product.product_suppliers_used(
-                **self._get_product_supplier_pattern()))
+            **self._get_product_supplier_pattern()))
         if len(product_suppliers) == 1:
             self.product_supplier, = product_suppliers
         elif (self.product_supplier
@@ -57,7 +62,8 @@ class PurchaseLine(metaclass=PoolMeta):
 
         self.analytic_accounts = tuple()
         try:
-            self.analytic_accounts += ({'root': self.purchase.account_analytic.root,
-                                        'account': self.purchase.account_analytic},) 
-        except:
-            pass
+            self.analytic_accounts += (
+                {'root': self.purchase.account_analytic.root,
+                 'account': self.purchase.account_analytic},)
+        except Exception as e:
+            raise ValidationError(f"Se produjo un error: {e}")
diff --git a/sale.py b/sale.py
index 49836fc..39009f8 100644
--- a/sale.py
+++ b/sale.py
@@ -1,10 +1,9 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-from trytond.pool import Pool, PoolMeta
-from trytond.model import ModelView, ModelSQL, fields
-from trytond.pyson import Eval
+from trytond.pool import PoolMeta
+from trytond.model import fields
+from trytond.model.exceptions import ValidationError
 
-from trytond.exceptions import UserError
 
 class Sale(metaclass=PoolMeta):
     'Sale Analytic Operation'
@@ -16,11 +15,10 @@ class Sale(metaclass=PoolMeta):
                                            ('type', '=', 'normal'),
                                        ])
 
+
 class SaleLine(metaclass=PoolMeta):
     'Sale Line Analytic Operation'
-    __name__ =  'sale.line'
-
-
+    __name__ = 'sale.line'
 
     @fields.depends('product', 'unit', 'sale',
                     '_parent_sale.party', '_parent_sale.invoice_party',
@@ -30,7 +28,7 @@ class SaleLine(metaclass=PoolMeta):
     def on_change_product(self):
         if not self.product:
             return
-        
+
         party = None
         if self.sale:
             party = self.sale.invoice_party or self.sale.party
@@ -44,13 +42,13 @@ class SaleLine(metaclass=PoolMeta):
 
         self.unit_price = self.compute_unit_price()
 
-
         self.type = 'line'
         self.amount = self.on_change_with_amount()
-        
+
         self.analytic_accounts = tuple()
         try:
-            self.analytic_accounts += ({'root': self.sale.account_analytic.root,
-                                        'account': self.sale.account_analytic},) 
-        except:
-            pass
+            self.analytic_accounts += (
+                {'root': self.sale.account_analytic.root,
+                 'account': self.sale.account_analytic},)
+        except Exception as e:
+            raise ValidationError(f"Se produjo un error: {e}")
diff --git a/setup.py b/setup.py
index 1d05cab..ca47a78 100755
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@ version = info.get('version', '0.0.1')
 major_version, minor_version, _ = version.split('.', 2)
 major_version = int(major_version)
 minor_version = int(minor_version)
-name = 'trytond_analytic_operation'
+name = 'trytond_analytic_operations'
 
 download_url = 'http://downloads.tryton.org/%s.%s/' % (
     major_version, minor_version)
@@ -85,19 +85,20 @@ setup(name=name,
     download_url=download_url,
     project_urls={
         "Bug Tracker": 'https://bugs.tryton.org/',
-        "Documentation": 'https://docs.tryton.org/projects/modules-analytic-operation',
+        "Documentation":
+            'https://docs.tryton.org/projects/modules-analytic-operation',
         "Forum": 'https://www.tryton.org/forum',
-        "Source Code": 'https://hg.tryton.org/modules/analytic_operation',
+        "Source Code": 'https://hg.tryton.org/modules/analytic_operations',
         },
     keywords='analitic, invoice, purchase, sale',
-    package_dir={'trytond.modules.analytic_operation': '.'},
+    package_dir={'trytond.modules.analytic_operations': '.'},
     packages=(
-        ['trytond.modules.analytic_operation']
-        + ['trytond.modules.analytic_operation.%s' % p
+        ['trytond.modules.analytic_operations']
+        + ['trytond.modules.analytic_operations.%s' % p
             for p in find_packages()]
         ),
     package_data={
-        'trytond.modules.analytic_operation': (info.get('xml', [])
+        'trytond.modules.analytic_operations': (info.get('xml', [])
             + ['tryton.cfg', 'view/*.xml', 'locale/*.po', '*.fodt',
                 'icons/*.svg', 'tests/*.rst']),
         },
@@ -150,6 +151,6 @@ setup(name=name,
     zip_safe=False,
     entry_points="""
     [trytond.modules]
-    analytic_operation = trytond.modules.analytic_operation
+    analytic_operations = trytond.modules.analytic_operations
     """,  # noqa: E501
     )
diff --git a/tests/test_module.py b/tests/test_module.py
index 37684b7..9657e44 100644
--- a/tests/test_module.py
+++ b/tests/test_module.py
@@ -5,7 +5,7 @@ from trytond.tests.test_tryton import ModuleTestCase
 
 class AnalyticOperationTestCase(ModuleTestCase):
     "Test Analytic Operation module"
-    module = 'analytic_operation'
+    module = 'analytic_operations'
 
 
 del ModuleTestCase
diff --git a/tox.ini b/tox.ini
index bf66988..05a5fe6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,8 +4,8 @@ envlist = {py37,py38,py39,py310}-{sqlite,postgresql}
 [testenv]
 extras = test
 commands =
-    coverage run --include=./**/analytic_operation/* -m unittest discover -s tests
-    coverage report --include=./**/analytic_operation/* --omit=*/tests/*
+    coverage run --include=./**//* -m unittest discover -s tests
+    coverage report --include=./**/analytic_operations/* --omit=*/tests/*
 deps =
     coverage
     postgresql: psycopg2 >= 2.7.0