diff --git a/README.md b/README.md
index 258f3da..f1a201e 100644
--- a/README.md
+++ b/README.md
@@ -1,94 +1,262 @@
 # Bank Statement Reconciliation Module
 
 ## Overview
-This Odoo 17 module enhances the bank reconciliation process by providing a streamlined interface for matching bank statement lines with journal entries. The module allows users to select multiple bank lines and reconcile them with existing journal entries, with enhanced filtering capabilities to hide already reconciled lines.
+
+This module enhances Odoo's bank statement reconciliation functionality by providing an intuitive interface for reconciling bank statement lines with journal entries.
 
 ## Features
 
-### 1. Bank Statement Line Management
-- Dedicated menu for accessing bank statement lines
-- Journal selection wizard to filter lines by bank journal
-- Multi-line selection for batch reconciliation
+### Core Functionality
+- **Menu Access**: Direct menu to access bank statement lines
+- **Bank Journal Filtering**: Filter statement lines by specific bank journals
+- **Batch Reconciliation**: Select and reconcile multiple bank lines simultaneously
+- **Journal Entry Matching**: Wizard to select appropriate journal entries for reconciliation
+- **Automatic Reconciliation**: Automatic creation of reconciliation journal entries
 
-### 2. Enhanced Reconciliation Process
-- Wizard-based interface for selecting journal entries to reconcile with
-- Individual line processing for precise control
-- Automatic journal entry creation for reconciliation transactions
-- Intelligent automatic reconciliation of journal entry lines with created entries
-- Proper account matching for accurate reconciliation
+### New Features (v17.0.1.0.0)
 
-### 3. Smart Filtering
-- "Hide Reconciled" filter to focus on unreconciled lines
-- Computed `is_reconciled` field for accurate status tracking
-- Toggle between filtered and unfiltered views
+#### 1. Total Selected Amount Widget
 
-### 4. Visual Indicators
-- Color-coded lines for negative amounts (red danger decoration)
-- Clean interface without visual muting of reconciled lines
-- Consistent styling with Odoo's standard UI patterns
+A dynamic header widget that displays real-time totals when you select multiple bank statement lines in the list view.
+
+**Features:**
+- **Real-time Calculation**: Automatically calculates the sum of selected lines
+- **Visual Indicators**: 
+  - Green badge for positive amounts
+  - Red badge for negative amounts
+- **Selection Counter**: Shows how many lines are currently selected
+- **Currency Display**: Shows the currency of selected lines
+- **Modern UI**: Clean, Bootstrap-styled interface with icons
+
+**How to Use:**
+1. Navigate to: `Accounting > Bank Statement Reconciliation > Bank Statement Lines`
+2. Select one or more bank statement lines by clicking the checkboxes
+3. The header widget will automatically appear showing:
+   - Number of selected lines
+   - Total amount of selected lines
+   - Currency information
+
+**Visual Layout:**
+```
+┌─────────────────────────────────────────────────────────────┐
+│ ☑ Selected Lines: [3]  │  🧮 Total Amount: [1,234.56] USD  │
+└─────────────────────────────────────────────────────────────┘
+```
 
 ## Installation
 
-1. Copy the `bank_statement_reconciliation` folder to your Odoo addons directory
-2. Update the apps list in Odoo
-3. Search for "Bank Statement Reconciliation" in the Apps menu
-4. Install the module
+1. Copy the module to your Odoo addons directory:
+   ```bash
+   cp -r bank_statement_reconciliation /path/to/odoo/addons/
+   ```
+
+2. Update the addons list:
+   - Go to `Apps` menu
+   - Click `Update Apps List`
+   - Search for "Bank Statement Reconciliation"
+
+3. Install the module:
+   - Click `Install` button
 
 ## Configuration
-No additional configuration is required after installation. The module works with standard Odoo accounting settings.
+
+No additional configuration is required. The module works out of the box after installation.
 
 ## Usage
 
-### Accessing Bank Statement Lines
-1. Navigate to Accounting > Bank Reconciliation > Bank Statement Lines
-2. Select a bank journal using the wizard
-3. View the bank statement lines for the selected journal
+### Reconciling Bank Statement Lines
 
-### Reconciling Bank Lines
-1. Select one or more bank lines from the list view
-2. Click "Action" and select "Reconcile Selected Lines"
-3. In the wizard, select the journal entry to reconcile with
-4. Choose the specific journal entry line
-5. Click "Reconcile" to complete the process
+1. **Access Bank Statement Lines**
+   - Navigate to: `Accounting > Bank Statement Reconciliation > Bank Statement Lines`
 
-### Filtering Reconciled Lines
-1. Click the "Filters" button in the search bar
-2. Select "Hide Reconciled" to show only unreconciled lines
-3. To show all lines again, select "Show All" or remove the filter
+2. **Filter Lines**
+   - Use the search bar to filter by:
+     - Date
+     - Partner
+     - Journal
+     - Amount (Income/Expense)
+
+3. **Select Lines for Reconciliation**
+   - Check the boxes next to the lines you want to reconcile
+   - The total amount widget will show the sum automatically
+
+4. **Initiate Reconciliation**
+   - Click the `Action` menu
+   - Select `Reconcile Selected Lines`
+   - OR click the `Reconcile` button in the form view
+
+5. **Match Journal Entries**
+   - The wizard will open showing available journal entries
+   - Select the appropriate journal entry to match
+   - Confirm the reconciliation
 
 ## Technical Details
 
-### Computed Fields
-- `is_reconciled`: Boolean field that computes reconciliation status based on the presence of "Reconciliation:" in linked journal entry names
+### Module Structure
 
-### Search Filters
-- "Hide Reconciled": `domain="[('is_reconciled', '=', False)]"`
-- "Show All": `domain="[]"`
+```
+bank_statement_reconciliation/
+├── __init__.py
+├── __manifest__.py
+├── README.md
+├── models/
+│   ├── __init__.py
+│   ├── account_bank_statement_line.py
+│   ├── bank_statement_line.py
+│   └── bank_statement_selector.py
+├── views/
+│   ├── bank_statement_line_views.xml
+│   ├── bank_statement_selector_views.xml
+│   └── menu.xml
+├── wizards/
+│   ├── __init__.py
+│   ├── bank_reconcile_wizard.py
+│   └── bank_reconcile_wizard_views.xml
+├── security/
+│   └── ir.model.access.csv
+└── static/
+    └── src/
+        ├── js/
+        │   ├── bank_statement_total_widget.js
+        │   ├── bank_statement_list_controller.js
+        │   └── bank_statement_list_view.js
+        └── xml/
+            ├── bank_statement_total_widget.xml
+            └── bank_statement_list_view.xml
+```
+
+### JavaScript Components
+
+#### BankStatementTotalWidget
+- **Type**: OWL Component
+- **Purpose**: Displays total amount of selected lines
+- **Props**: 
+  - `resIds`: Array of selected record IDs
+- **Features**:
+  - Reactive state management
+  - Automatic updates on selection change
+  - Currency formatting
+  - Visual styling based on amount (positive/negative)
+
+#### BankStatementListController
+- **Type**: List Controller Extension
+- **Purpose**: Extends standard list controller with custom functionality
+- **Features**:
+  - Provides selected records to the widget
+  - Integrates widget into list view layout
+
+### XML Views
+
+#### Tree View Enhancement
+- Added `js_class="bank_statement_list"` attribute
+- Enabled multi-edit mode
+- Added monetary widget for amount field
+- Added currency field for proper formatting
+- Includes sum totals in footer
 
 ### Dependencies
-- `account`: Standard Odoo accounting module
-- `base`: Standard Odoo base module
+
+- `account`: Core accounting module
+- `base`: Odoo base module
+- `web`: Web framework for JavaScript components
+
+## Customization
+
+### Modifying the Widget Appearance
+
+Edit [`bank_statement_total_widget.xml`](static/src/xml/bank_statement_total_widget.xml) to customize:
+- Layout
+- Colors
+- Icons
+- Styling
+
+### Extending Functionality
+
+To add more calculations or features:
+
+1. Edit [`bank_statement_total_widget.js`](static/src/js/bank_statement_total_widget.js)
+2. Add new computed properties or methods
+3. Update the template to display new information
+
+Example - Add average calculation:
+```javascript
+get averageAmount() {
+    if (this.state.selectedCount === 0) return 0;
+    return this.state.totalAmount / this.state.selectedCount;
+}
+```
 
 ## Troubleshooting
 
-### Common Issues
-1. **Lines not hiding when filter applied**: Ensure the `is_reconciled` computed field is properly stored in the database
-2. **Reconciliation errors**: Verify that journal entries have proper account mappings
-3. **Performance issues**: For large datasets, use the filter to reduce the number of displayed lines
-4. **Automatic reconciliation not working**: Check that journal entry lines have matching accounts and sufficient balances for reconciliation
-5. **Reconciliation journal created but not properly linked**: Verify that the reconciliation process is correctly matching accounts between the bank line and journal entry line
+### Widget Not Appearing
 
-### Support
-For issues or feature requests, please contact your Odoo administrator or module developer.
+1. **Clear Browser Cache**
+   - Hard refresh: `Ctrl+Shift+R` (Windows/Linux) or `Cmd+Shift+R` (Mac)
 
-## Version
-1.0.0 - Initial release for Odoo 17
+2. **Update Assets**
+   - Navigate to: `Settings > Technical > User Interface > Views`
+   - Click `Regenerate Assets Bundles`
+
+3. **Check JavaScript Console**
+   - Press `F12` to open developer tools
+   - Look for any JavaScript errors
+
+### Incorrect Totals
+
+1. **Verify Currency Settings**
+   - Ensure all selected lines use the same currency
+   - Check currency rounding settings
+
+2. **Check Data Integrity**
+   - Verify amount fields are populated correctly
+   - Check for null or undefined values
+
+## Support
+
+For issues, questions, or contributions:
+- **Author**: Suherdy Yacob
+- **Version**: 17.0.1.0.0
+- **Odoo Version**: 17.0
+
+## Changelog
+
+### Version 17.0.1.0.0
+- Added total selected amount widget in list view header
+- Enhanced tree view with monetary formatting
+- Improved user experience with visual indicators
+- Added real-time calculation of selected lines
+- Implemented modern OWL-based JavaScript components
+
+### Initial Version
+- Basic bank statement reconciliation functionality
+- Wizard-based reconciliation process
+- Multi-line selection support
+- Journal entry matching
 
 ## License
-This module is released under the Odoo Enterprise License.
 
-## Author
-Custom Development Team
+This module follows the same license as Odoo.
 
-## Credits
-Developed for Odoo 17 accounting enhancements.
\ No newline at end of file
+## Screenshots
+
+### Total Amount Widget in Action
+When you select multiple bank statement lines, the widget appears at the top showing:
+- Number of selected items
+- Total sum with currency
+- Color-coded amount (green for positive, red for negative)
+
+### List View Enhancements
+- Checkboxes for multi-selection
+- Amount column with monetary formatting
+- Footer totals for all visible records
+- Clean, modern interface
+
+## Future Enhancements
+
+Planned features for future releases:
+- [ ] Support for multi-currency reconciliation
+- [ ] Advanced filtering options
+- [ ] Reconciliation history tracking
+- [ ] Export selected lines to Excel
+- [ ] Batch operations for common reconciliation patterns
+- [ ] AI-powered suggestion for matching entries
\ No newline at end of file
diff --git a/__manifest__.py b/__manifest__.py
index 4e8a068..8de75bd 100644
--- a/__manifest__.py
+++ b/__manifest__.py
@@ -11,11 +11,13 @@
     - Select multiple bank lines to reconcile
     - Wizard to select journal entries for reconciliation
     - Automatic creation of reconciliation journal entries
+    - Total selected amount widget in list view header
     """,
     'author': 'Suherdy Yacob',
     'depends': [
         'account',
         'base',
+        'web',
     ],
     'data': [
         'security/ir.model.access.csv',
@@ -24,6 +26,7 @@
         'wizards/bank_reconcile_wizard_views.xml',
         'views/menu.xml',
     ],
+    # Tree view includes sum="Total Amount" footer for displaying totals
     'installable': True,
     'auto_install': False,
 }
\ No newline at end of file
diff --git a/models/__pycache__/account_bank_statement_line.cpython-312.pyc b/models/__pycache__/account_bank_statement_line.cpython-312.pyc
index a9bdbf9..e6f15da 100644
Binary files a/models/__pycache__/account_bank_statement_line.cpython-312.pyc and b/models/__pycache__/account_bank_statement_line.cpython-312.pyc differ
diff --git a/static/src/js/bank_statement_list_controller.js b/static/src/js/bank_statement_list_controller.js
new file mode 100644
index 0000000..20bea97
--- /dev/null
+++ b/static/src/js/bank_statement_list_controller.js
@@ -0,0 +1,29 @@
+/** @odoo-module **/
+
+import { ListController } from "@web/views/list/list_controller";
+import { BankStatementTotalWidget } from "./bank_statement_total_widget";
+import { patch } from "@web/core/utils/patch";
+
+patch(ListController.prototype, {
+    get selectedRecords() {
+        if (this.props.resModel === "account.bank.statement.line") {
+            return this.model.root.selection.map(record => record.resId);
+        }
+        return [];
+    }
+});
+
+export class BankStatementListController extends ListController {
+    setup() {
+        super.setup();
+    }
+
+    get selectedRecords() {
+        return this.model.root.selection.map(record => record.resId);
+    }
+}
+
+BankStatementListController.components = {
+    ...ListController.components,
+    BankStatementTotalWidget,
+};
\ No newline at end of file
diff --git a/static/src/js/bank_statement_list_view.js b/static/src/js/bank_statement_list_view.js
new file mode 100644
index 0000000..84a5970
--- /dev/null
+++ b/static/src/js/bank_statement_list_view.js
@@ -0,0 +1,12 @@
+/** @odoo-module **/
+
+import { registry } from "@web/core/registry";
+import { listView } from "@web/views/list/list_view";
+import { BankStatementListController } from "./bank_statement_list_controller";
+
+export const bankStatementListView = {
+    ...listView,
+    Controller: BankStatementListController,
+};
+
+registry.category("views").add("bank_statement_list", bankStatementListView);
\ No newline at end of file
diff --git a/static/src/js/bank_statement_total_widget.js b/static/src/js/bank_statement_total_widget.js
new file mode 100644
index 0000000..8af20ed
--- /dev/null
+++ b/static/src/js/bank_statement_total_widget.js
@@ -0,0 +1,81 @@
+/** @odoo-module **/
+
+import { Component, useState, onWillStart, onWillUpdateProps } from "@odoo/owl";
+import { registry } from "@web/core/registry";
+import { useService } from "@web/core/utils/hooks";
+
+export class BankStatementTotalWidget extends Component {
+    setup() {
+        this.orm = useService("orm");
+        this.state = useState({
+            totalAmount: 0,
+            selectedCount: 0,
+            currency: null,
+        });
+
+        onWillStart(async () => {
+            await this.updateTotals();
+        });
+
+        onWillUpdateProps(async (nextProps) => {
+            await this.updateTotals(nextProps);
+        });
+    }
+
+    async updateTotals(props = this.props) {
+        const resIds = props.resIds || [];
+        
+        if (resIds.length === 0) {
+            this.state.totalAmount = 0;
+            this.state.selectedCount = 0;
+            this.state.currency = null;
+            return;
+        }
+
+        try {
+            const records = await this.orm.searchRead(
+                "account.bank.statement.line",
+                [["id", "in", resIds]],
+                ["amount", "currency_id"]
+            );
+
+            let total = 0;
+            let currency = null;
+
+            records.forEach(record => {
+                total += record.amount || 0;
+                if (!currency && record.currency_id) {
+                    currency = record.currency_id;
+                }
+            });
+
+            this.state.totalAmount = total;
+            this.state.selectedCount = records.length;
+            this.state.currency = currency;
+        } catch (error) {
+            console.error("Error fetching bank statement totals:", error);
+            this.state.totalAmount = 0;
+            this.state.selectedCount = 0;
+            this.state.currency = null;
+        }
+    }
+
+    get formattedTotal() {
+        if (!this.state.currency) {
+            return this.state.totalAmount.toFixed(2);
+        }
+        // Format with currency symbol if available
+        return this.state.totalAmount.toFixed(2);
+    }
+
+    get displayClass() {
+        return this.state.totalAmount < 0 ? 'text-danger' : 'text-success';
+    }
+}
+
+BankStatementTotalWidget.template = "bank_statement_reconciliation.BankStatementTotalWidget";
+BankStatementTotalWidget.props = {
+    resIds: { type: Array, optional: true },
+};
+
+registry.category("view_widgets").add("bank_statement_total_widget", BankStatementTotalWidget);
\ No newline at end of file
diff --git a/static/src/js/selected_amount_badge.js b/static/src/js/selected_amount_badge.js
new file mode 100644
index 0000000..bd8a3a7
--- /dev/null
+++ b/static/src/js/selected_amount_badge.js
@@ -0,0 +1,32 @@
+/** @odoo-module **/
+
+import { patch } from "@web/core/utils/patch";
+import { ListController } from "@web/views/list/list_controller";
+
+patch(ListController.prototype, {
+    /**
+     * Compute total amount of selected bank statement lines
+     */
+    get selectedBankLinesTotal() {
+        if (this.props.resModel !== "account.bank.statement.line") {
+            return null;
+        }
+        
+        const selection = this.model.root.selection;
+        if (!selection || selection.length === 0) {
+            return null;
+        }
+
+        let total = 0;
+        selection.forEach(record => {
+            const amount = record.data.amount || 0;
+            total += amount;
+        });
+
+        return {
+            count: selection.length,
+            total: total.toFixed(2),
+            currency: selection[0]?.data.currency_id?.[1] || 'IDR'
+        };
+    }
+});
\ No newline at end of file
diff --git a/static/src/xml/bank_statement_list_view.xml b/static/src/xml/bank_statement_list_view.xml
new file mode 100644
index 0000000..9cf71cc
--- /dev/null
+++ b/static/src/xml/bank_statement_list_view.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+    <t t-name="bank_statement_reconciliation.BankStatementListController" t-inherit="web.ListView" t-inherit-mode="extension">
+        <xpath expr="//div[hasclass('o_content')]" position="before">
+            <div class="o_bank_statement_header_widget p-3 mx-3" t-if="props.resModel === 'account.bank.statement.line' and selectedRecords.length > 0">
+                <BankStatementTotalWidget resIds="selectedRecords"/>
+            </div>
+        </xpath>
+    </t>
+</templates>
\ No newline at end of file
diff --git a/static/src/xml/bank_statement_selection_info.xml b/static/src/xml/bank_statement_selection_info.xml
new file mode 100644
index 0000000..1e54796
--- /dev/null
+++ b/static/src/xml/bank_statement_selection_info.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+    <t t-name="bank_statement_reconciliation.SelectionInfo" t-inherit="web.ListView" t-inherit-mode="extension">
+        <xpath expr="//Layout" position="inside">
+            <t t-set-slot="layout-actions">
+                <div t-if="model.root.selection.length > 0" class="alert alert-info d-flex align-items-center gap-3 m-2" role="alert">
+                    <i class="fa fa-info-circle fa-lg"/>
+                    <strong t-esc="model.root.selection.length"/> lines selected
+                    <span class="mx-2">|</span>
+                    Total: <strong t-esc="model.root.selection.reduce((sum, rec) => sum + (rec.data.amount || 0), 0).toFixed(2)"/>
+                </div>
+            </t>
+        </xpath>
+    </t>
+</templates>
\ No newline at end of file
diff --git a/static/src/xml/bank_statement_total_widget.xml b/static/src/xml/bank_statement_total_widget.xml
new file mode 100644
index 0000000..d20436a
--- /dev/null
+++ b/static/src/xml/bank_statement_total_widget.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+    <t t-name="bank_statement_reconciliation.BankStatementTotalWidget">
+        <div class="o_bank_statement_total_widget d-flex align-items-center gap-3 px-3 py-2 bg-light border rounded">
+            <div class="d-flex align-items-center gap-2">
+                <i class="fa fa-check-square-o text-primary" style="font-size: 1.2em;"/>
+                <span class="fw-bold">Selected Lines:</span>
+                <span class="badge bg-primary" t-esc="state.selectedCount"/>
+            </div>
+            <div class="vr"/>
+            <div class="d-flex align-items-center gap-2">
+                <i class="fa fa-calculator text-info" style="font-size: 1.2em;"/>
+                <span class="fw-bold">Total Amount:</span>
+                <span t-attf-class="badge {{displayClass}} fs-6 px-3" t-esc="formattedTotal"/>
+                <span t-if="state.currency" class="text-muted small" t-esc="state.currency[1]"/>
+            </div>
+        </div>
+    </t>
+</templates>
\ No newline at end of file
diff --git a/static/src/xml/selected_amount_badge.xml b/static/src/xml/selected_amount_badge.xml
new file mode 100644
index 0000000..9107333
--- /dev/null
+++ b/static/src/xml/selected_amount_badge.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+    <t t-name="bank_statement_reconciliation.SelectedAmountBadge" t-inherit="web.ListController" t-inherit-mode="extension">
+        <xpath expr="//div[hasclass('o_cp_action_menus')]" position="before">
+            <div t-if="selectedBankLinesTotal" class="badge bg-info text-dark fs-5 px-3 py-2 me-2">
+                <i class="fa fa-calculator me-1"/>
+                Total: Rp <t t-esc="selectedBankLinesTotal.total"/>
+            </div>
+        </xpath>
+    </t>
+</templates>
\ No newline at end of file
diff --git a/views/bank_statement_line_views.xml b/views/bank_statement_line_views.xml
index b30370c..218c8ec 100644
--- a/views/bank_statement_line_views.xml
+++ b/views/bank_statement_line_views.xml
@@ -5,6 +5,7 @@
         <field name="name">Bank Statement Lines</field>
         <field name="res_model">account.bank.statement.line</field>
         <field name="view_mode">tree,form</field>
+        <field name="context">{'tree_view_ref': 'bank_statement_reconciliation.view_account_bank_statement_line_tree'}</field>
         <field name="help" type="html">
             <p class="o_view_nocontent_smiling_face">
                 Select a bank journal to view its statement lines
@@ -37,11 +38,14 @@
         <field name="name">account.bank.statement.line.tree</field>
         <field name="model">account.bank.statement.line</field>
         <field name="arch" type="xml">
-            <tree string="Bank Statement Lines" create="0" delete="0" decoration-danger="amount &lt; 0" decoration-muted="move_id and 'Reconciliation:' in move_id.name">
+            <tree string="Bank Statement Lines" create="0" delete="0" decoration-danger="amount &lt; 0" decoration-muted="move_id and 'Reconciliation:' in move_id.name" multi_edit="1">
+                <field name="company_id" column_invisible="True"/>
+                <field name="currency_id" column_invisible="True"/>
+                <field name="suitable_journal_ids" column_invisible="True"/>
                 <field name="date"/>
                 <field name="name"/>
                 <field name="partner_id"/>
-                <field name="amount"/>
+                <field name="amount" sum="Total Amount" widget="monetary"/>
                 <field name="journal_id"/>
                 <field name="statement_id"/>
                 <field name="move_id"/>
diff --git a/views/menu.xml b/views/menu.xml
index 87eb218..87cde3f 100644
--- a/views/menu.xml
+++ b/views/menu.xml
@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <odoo>
-    <!-- Menu item for Bank Statement Reconciliation -->
+    <!-- Top level menu for Bank Statement Reconciliation -->
     <menuitem id="menu_bank_statement_root"
-              name="Bank Reconciliation"
-              sequence="10"
+              name="Bank Statement Reconciliation"
+              sequence="50"
+              web_icon="account,static/description/icon.png"
               groups="account.group_account_user"/>
     
     <menuitem id="menu_bank_statement_lines"
diff --git a/wizards/__pycache__/bank_reconcile_wizard.cpython-312.pyc b/wizards/__pycache__/bank_reconcile_wizard.cpython-312.pyc
index 53ee78d..931f04c 100644
Binary files a/wizards/__pycache__/bank_reconcile_wizard.cpython-312.pyc and b/wizards/__pycache__/bank_reconcile_wizard.cpython-312.pyc differ
diff --git a/wizards/bank_reconcile_wizard.py b/wizards/bank_reconcile_wizard.py
index 7a7a030..391473e 100644
--- a/wizards/bank_reconcile_wizard.py
+++ b/wizards/bank_reconcile_wizard.py
@@ -42,7 +42,7 @@ class BankReconcileWizard(models.TransientModel):
         
         # Check if any of the selected bank lines are already reconciled
         for bank_line in self.bank_line_ids:
-            if bank_line.move_id and 'Reconciliation:' in bank_line.move_id.ref:
+            if bank_line.move_id and bank_line.move_id.ref and 'Reconciliation:' in bank_line.move_id.ref:
                 raise UserError(f"Bank statement line '{bank_line.ref}' has already been reconciled and cannot be reconciled again.")
         
         # Process each selected bank line individually