diff --git a/application/controllers/Hrdlog.php b/application/controllers/Hrdlog.php
index e1544c0ae..934cd1b2e 100644
--- a/application/controllers/Hrdlog.php
+++ b/application/controllers/Hrdlog.php
@@ -165,10 +165,12 @@ class Hrdlog extends CI_Controller {
 
         $this->load->model('logbook_model');
 
-        foreach ($data['qsos']->result() as $qso)
+	if (isset($data['qsos'])) {
+		foreach ($data['qsos']->result() as $qso)
 		{
-            $this->logbook_model->mark_hrdlog_qsos_sent($qso->COL_PRIMARY_KEY);
-        }
+			$this->logbook_model->mark_hrdlog_qsos_sent($qso->COL_PRIMARY_KEY);
+		}
+	}
 
         $this->load->view('interface_assets/header', $data);
         $this->load->view('hrdlog/mark_hrdlog', $data);
diff --git a/application/controllers/Lotw.php b/application/controllers/Lotw.php
index 80859adc4..15a0adbb7 100644
--- a/application/controllers/Lotw.php
+++ b/application/controllers/Lotw.php
@@ -717,9 +717,9 @@ class Lotw extends CI_Controller {
 
 			// Get credentials for LoTW
 			$query = $this->user_model->get_by_id($this->session->userdata('user_id'));
-    	    $q = $query->row();
-    	    $data['user_lotw_name'] = urlencode($q->user_lotw_name);
-			$data['user_lotw_password'] = urlencode($q->user_lotw_password);
+			$q = $query->row();
+			$data['user_lotw_name'] = urlencode($q->user_lotw_name ?? '');
+			$data['user_lotw_password'] = urlencode($q->user_lotw_password ?? '');
 
 			// Get URL for downloading LoTW
 			$query = $query = $this->db->query('SELECT lotw_download_url FROM config');
@@ -733,15 +733,15 @@ class Lotw extends CI_Controller {
 				$this->session->set_flashdata('warning', 'You have not defined your ARRL LoTW credentials!'); redirect('lotw/import');
 			}
 
-            $customDate = $this->input->post('from');
+			$customDate = $this->input->post('from');
 
 			if ($customDate != NULL) {
-                $lotw_last_qsl_date = date($customDate);
-            }
-            else {
-                // Query the logbook to determine when the last LoTW confirmation was
-                $lotw_last_qsl_date = date('Y-m-d', strtotime($this->logbook_model->lotw_last_qsl_date($this->session->userdata['user_id'])));
-            }
+				$lotw_last_qsl_date = date($customDate);
+			}
+			else {
+				// Query the logbook to determine when the last LoTW confirmation was
+				$lotw_last_qsl_date = date('Y-m-d', strtotime($this->logbook_model->lotw_last_qsl_date($this->session->userdata['user_id'])));
+			}
 
 			// Build URL for LoTW report file
 			$lotw_url .= "?";
diff --git a/application/controllers/Qrz.php b/application/controllers/Qrz.php
index c2ea63fdc..290df4594 100644
--- a/application/controllers/Qrz.php
+++ b/application/controllers/Qrz.php
@@ -170,9 +170,10 @@ class Qrz extends CI_Controller {
 
 		$this->load->model('logbook_model');
 
-		foreach ($data['qsos']->result() as $qso)
-		{
-			$this->logbook_model->mark_qrz_qsos_sent($qso->COL_PRIMARY_KEY);
+		if (isset($data['qsos'])) {
+			foreach ($data['qsos']->result() as $qso) {
+				$this->logbook_model->mark_qrz_qsos_sent($qso->COL_PRIMARY_KEY);
+			}
 		}
 
 		$this->load->view('interface_assets/header', $data);
diff --git a/application/models/Distances_model.php b/application/models/Distances_model.php
index 3aa17c0c0..2a0bd27fd 100644
--- a/application/models/Distances_model.php
+++ b/application/models/Distances_model.php
@@ -162,7 +162,7 @@ class Distances_model extends CI_Model
 				'Callsign' => '',
 				'Grid' => '',
 				'Distance' => '',
-				'Qsos' => '',
+				'Qsos' => 0,
 				'Grids' => ''
 			);
 
diff --git a/application/views/search/search_result_ajax.php b/application/views/search/search_result_ajax.php
index 639fe95ea..18cce9d8b 100644
--- a/application/views/search/search_result_ajax.php
+++ b/application/views/search/search_result_ajax.php
@@ -192,7 +192,7 @@ $ci =& get_instance();
 				case 'SOTA':    echo '<td>' . ($row->COL_SOTA_REF); break;
 				case 'WWFF':    echo '<td>' . ($row->COL_WWFF_REF); break;
 				case 'POTA':    echo '<td>' . ($row->COL_POTA_REF); break;
-				case 'Grid':    echo '<td>'; echo strlen($row->COL_GRIDSQUARE)==0?$row->COL_VUCC_GRIDS:$row->COL_GRIDSQUARE; break;
+				case 'Grid':    echo '<td>'; echo strlen($row->COL_GRIDSQUARE ?? '')==0?$row->COL_VUCC_GRIDS ?? '':$row->COL_GRIDSQUARE; break;
 				case 'Distance':echo '<td>' . ($row->COL_DISTANCE ? $row->COL_DISTANCE . '&nbsp;km' : ''); break;
 				case 'Band':    echo '<td>'; if($row->COL_SAT_NAME != null) { echo $row->COL_SAT_NAME; } else { echo strtolower($row->COL_BAND); }; break;
 				case 'State':   echo '<td>' . ($row->COL_STATE); break;