diff -r 86289b0c4a27 -r 08c0343b622b www/js/inv_yeasts.js
--- a/www/js/inv_yeasts.js	Sun Jul 04 12:16:25 2021 +0200
+++ b/www/js/inv_yeasts.js	Sun Jul 04 14:25:52 2021 +0200
@@ -114,8 +114,13 @@
     cache: false,
     data: data,
     type: 'POST',
-    success: function(data, status, xhr) {
-     commit(true);
+    success: function(data) {
+     if (data.error) {
+      console.log('delete: ' + data.msg);
+      alert('Fout: ' + data.msg);
+     } else {
+      console.log('delete: success');
+     }
      location.reload(true);
     },
     error: function(jqXHR, textStatus, errorThrown) { commit(false); }
@@ -129,8 +134,13 @@
     cache: false,
     data: data,
     type: 'POST',
-    success: function(data, status, xhr) {
-     commit(true);
+    success: function(data) {
+     if (data.error) {
+      console.log('insert: ' + data.msg);
+      alert('Fout: ' + data.msg);
+     } else {
+      console.log('insert: success');
+     }
      location.reload(true);
     },
     error: function(jqXHR, textStatus, errorThrown) { commit(false); }
@@ -144,8 +154,13 @@
     cache: false,
     data: data,
     type: 'POST',
-    success: function(data, status, xhr) {
-     commit(true);
+    success: function(data) {
+     if (data.error) {
+      console.log('updaterow: ' + data.msg);
+      alert('Fout: ' + data.msg);
+     } else {
+      console.log('updaterow: success');
+     }
      location.reload(true);
     },
     error: function(jqXHR, textStatus, errorThrown) { commit(false); }