Fixed issue with variables not being updated in Excel file

server.js

@@ -35,22 +35,33 @@ app.post('/calculate', async (req, res) => {
     await updateConfig(formData);
     console.log('Config file updated successfully');
     
-    // Run Python script to create Excel file
-    exec('python3 create_excel.py', (error, stdout, stderr) => {
-      if (error) {
-        console.error(`Error executing Python script: ${error}`);
-        console.error(`stderr: ${stderr}`);
-      } else {
-        console.log(`Python script output: ${stdout}`);
+    // Run Python script to create Excel file synchronously
+    const { execSync } = require('child_process');
+    try {
+      console.log('Executing Python script...');
+      const stdout = execSync('python3 create_excel.py', { encoding: 'utf8' });
+      console.log(`Python script output: ${stdout}`);
+      
+      // Send success response after Python script completes
+      res.json({
+        success: true,
+        message: 'Form data saved and Excel file created successfully'
+      });
+      console.log('Success response sent');
+    } catch (execError) {
+      console.error(`Error executing Python script: ${execError.message}`);
+      if (execError.stderr) {
+        console.error(`stderr: ${execError.stderr}`);
       }
-    });
-    
-    // Send success response
-    res.json({
-      success: true,
-      message: 'Form data saved successfully'
-    });
-    console.log('Success response sent');
+      
+      // Send error response for Python script failure
+      res.status(500).json({
+        success: false,
+        message: 'Error creating Excel file',
+        error: execError.message
+      });
+      console.error('Error response sent for Python script failure');
+    }
   } catch (error) {
     console.error('Error processing form data:', error);
     console.error('Error stack:', error.stack);