diff --git a/backend/src/routes/applications.js b/backend/src/routes/applications.js
index af941a0..8af992f 100644
--- a/backend/src/routes/applications.js
+++ b/backend/src/routes/applications.js
@@ -1008,6 +1008,8 @@ router.get('/logs', async (req, res, next) => {
 // @access  Private
 router.post('/logs', validateRequest(applicationLogSchema), async (req, res, next) => {
   try {
+    console.log('Create log request received:', JSON.stringify(req.body, null, 2));
+    
     const { 
       planId, 
       lawnSectionId, 
@@ -1052,6 +1054,18 @@ router.post('/logs', validateRequest(applicationLogSchema), async (req, res, nex
       }
 
       // Create application log
+      console.log('Inserting application log with values:', {
+        planId, 
+        userId: req.user.id, 
+        lawnSectionId, 
+        equipmentId, 
+        weatherConditions: JSON.stringify(weatherConditions), 
+        gpsTrack: JSON.stringify(gpsTrack), 
+        averageSpeed, 
+        areaCovered, 
+        notes
+      });
+      
       const logResult = await client.query(
         `INSERT INTO application_logs 
          (plan_id, user_id, lawn_section_id, equipment_id, weather_conditions, 
@@ -1064,8 +1078,10 @@ router.post('/logs', validateRequest(applicationLogSchema), async (req, res, nex
       );
 
       const log = logResult.rows[0];
+      console.log('Application log inserted successfully:', log);
 
       // Add products to log
+      console.log('Adding products to log:', products);
       for (const product of products) {
         const { 
           productId, 
@@ -1077,6 +1093,11 @@ router.post('/logs', validateRequest(applicationLogSchema), async (req, res, nex
           actualSpeedMph 
         } = product;
 
+        console.log('Inserting product:', { 
+          logId: log.id, productId, userProductId, rateAmount, rateUnit, 
+          actualProductAmount, actualWaterAmount, actualSpeedMph 
+        });
+
         await client.query(
           `INSERT INTO application_log_products 
            (log_id, product_id, user_product_id, rate_amount, rate_unit, 
@@ -1085,6 +1106,8 @@ router.post('/logs', validateRequest(applicationLogSchema), async (req, res, nex
           [log.id, productId, userProductId, rateAmount, rateUnit, 
            actualProductAmount, actualWaterAmount, actualSpeedMph]
         );
+        
+        console.log('Product inserted successfully');
       }
 
       // If this was from a plan, mark the plan as completed
diff --git a/backend/src/utils/validation.js b/backend/src/utils/validation.js
index 77a9e60..38e24ac 100644
--- a/backend/src/utils/validation.js
+++ b/backend/src/utils/validation.js
@@ -177,7 +177,7 @@ const applicationLogSchema = Joi.object({
     actualProductAmount: Joi.number().positive(),
     actualWaterAmount: Joi.number().positive(),
     actualSpeedMph: Joi.number().positive()
-  })).min(1).required()
+  }).or('productId', 'userProductId')).min(1).required()
 });
 
 // Validation middleware
diff --git a/frontend/src/components/Applications/ApplicationExecutionModal.js b/frontend/src/components/Applications/ApplicationExecutionModal.js
index 945ffe5..fddeda4 100644
--- a/frontend/src/components/Applications/ApplicationExecutionModal.js
+++ b/frontend/src/components/Applications/ApplicationExecutionModal.js
@@ -245,30 +245,52 @@ const ApplicationExecutionModal = ({ application, propertyDetails, onClose, onCo
     // Validate required fields
     if (!validSectionId) {
       toast.error('No valid section found for this application');
+      console.error('Invalid section ID:', validSectionId, 'Available sections:', sections);
       return;
     }
     if (!validEquipmentId) {
       toast.error('No equipment information found for this application');
+      console.error('Invalid equipment ID:', validEquipmentId, 'Plan details:', planDetails);
       return;
     }
     if (validProducts.length === 0) {
       toast.error('No products found for this application');
+      console.error('No valid products. Original products:', planDetails?.products, 'Filtered products:', validProducts);
       return;
     }
+    
+    // Validate GPS tracking data exists
+    if (gpsTrack.length === 0) {
+      console.warn('No GPS tracking data collected');
+      toast.error('No GPS tracking data was collected. Please ensure location services are enabled.');
+      return;
+    }
+    
+    console.log('All validations passed. GPS points:', gpsTrack.length, 'Total distance:', totalDistance, 'Duration:', duration);
+
+    // Prepare GPS track data - ensure all required fields are present and valid
+    const gpsTrackData = {
+      points: gpsTrack.map(point => ({
+        lat: point.lat,
+        lng: point.lng,
+        timestamp: point.timestamp,
+        accuracy: point.accuracy || 0,
+        speed: point.speed || 0
+      })),
+      totalDistance: Math.round(totalDistance * 100) / 100, // Round to 2 decimal places
+      duration: Math.round(duration), // Duration in seconds
+      averageSpeed: Math.round(averageSpeed * 100) / 100 // Round to 2 decimal places
+    };
 
     // Try minimal log data first
     const logData = {
       planId: application.id,
       lawnSectionId: validSectionId,
       equipmentId: validEquipmentId,
-      gpsTrack: {
-        points: gpsTrack,
-        totalDistance: totalDistance,
-        duration: duration
-      }, // Backend expects object format
+      gpsTrack: gpsTrackData, // Backend expects object format with points array
       averageSpeed: Math.max(averageSpeed, 0.1), // Ensure positive number
-      areaCovered: application.totalSectionArea || application.sectionArea || 0,
-      notes: `Application completed via mobile tracking. Duration: ${Math.round(duration/60)} minutes`,
+      areaCovered: Math.max(application.totalSectionArea || application.sectionArea || 0, 0.1), // Ensure positive
+      notes: `Application completed via mobile tracking. Duration: ${Math.round(duration/60)} minutes, Distance: ${(totalDistance * 3.28084).toFixed(0)} ft, Points: ${gpsTrack.length}`,
       products: validProducts
     };
     
@@ -277,12 +299,16 @@ const ApplicationExecutionModal = ({ application, propertyDetails, onClose, onCo
     
     try {
       // Save the application log to the backend
-      await applicationsAPI.createLog(logData);
+      console.log('About to call createLog with data:', JSON.stringify(logData, null, 2));
+      const response = await applicationsAPI.createLog(logData);
+      console.log('CreateLog response:', response);
       toast.success('Application completed successfully');
       onComplete();
     } catch (error) {
       console.error('Failed to save application log:', error);
-      toast.error('Failed to save application log');
+      console.error('Error details:', error.response?.data);
+      console.error('Full error object:', JSON.stringify(error.response || error, null, 2));
+      toast.error(`Failed to save application log: ${error.response?.data?.message || error.message}`);
     }
   };