diff --git a/assets/js/sections/hrdlog.js b/assets/js/sections/hrdlog.js
index bf7779d26..4d63ae162 100644
--- a/assets/js/sections/hrdlog.js
+++ b/assets/js/sections/hrdlog.js
@@ -12,9 +12,14 @@ function ExportHrd(station_id) {
 		url: base_url + 'index.php/hrdlog/upload_station',
 		type: 'post',
 		data: {'station_id': station_id},
+		dataType: 'json',
 		success: function (data) {
+			
+			//modify running state
 			$(".ld-ext-right-"+station_id).removeClass('running');
 			$(".ld-ext-right-"+station_id).prop('disabled', false);
+			
+			//react to success
 			if (data.status == 'OK') {
 				$.each(data.info, function(index, value){
 					$('#modcount'+value.station_id).html(value.modcount);
@@ -22,29 +27,39 @@ function ExportHrd(station_id) {
 					$('#totcount'+value.station_id).html(value.totcount);
 				});
 				$(".card-body").append('<div class="alert alert-success" role="alert">' + data.infomessage + '</div>');
-			}
-			else {
-				$(".card-body").append('<div class="alert alert-info" role="alert">' + data.info + '</div>');
+				return;
 			}
 
-			if (data.errormessages.length > 0) {
-				$("#hrdlog_export").append(
-					'<div class="errormessages">\n' +
-					'    <div class="card mt-2">\n' +
-					'        <div class="card-header bg-danger">\n' +
-					'            Error Message\n' +
-					'        </div>\n' +
-					'        <div class="card-body">\n' +
-					'            <div class="errors"></div>\n' +
-					'        </div>\n' +
-					'    </div>\n' +
-					'</div>'
-				);
-				$.each(data.errormessages, function (index, value) {
-					$(".errors").append('<li>' + value);
-				});
+			//react to errors during upload
+			if (data.status == 'Error') {
+				$(".card-body").append('<div class="alert alert-info" role="alert">' + data.info + '</div>');
+
+				if (data.errormessages.length > 0) {
+					$("#hrdlog_export").append(
+						'<div class="errormessages">\n' +
+						'    <div class="card mt-2">\n' +
+						'        <div class="card-header bg-danger">\n' +
+						'            Error Message\n' +
+						'        </div>\n' +
+						'        <div class="card-body">\n' +
+						'            <div class="errors"></div>\n' +
+						'        </div>\n' +
+						'    </div>\n' +
+						'</div>'
+					);
+					$.each(data.errormessages, function (index, value) {
+						$(".errors").append('<li>' + value);
+					});
+				}
+				return;
 			}
-			
+
+			//react to errors due to credentials or disabled upload
+			if (data.status == 'Credential_Error'){
+				$(".card-body").append('<div class="alert alert-danger" role="alert">' + data.infomessage + '</div>');
+				return;
+			}
+
 		}
 	});
 }