diff -r 86289b0c4a27 -r 08c0343b622b www/js/inv_waters.js
--- a/www/js/inv_waters.js	Sun Jul 04 12:16:25 2021 +0200
+++ b/www/js/inv_waters.js	Sun Jul 04 14:25:52 2021 +0200
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Copyright (C) 2014-2020
+ * Copyright (C) 2014-2021
  *
  * Michiel Broek <mbroek at mbse dot eu>
  *
@@ -93,8 +93,13 @@
     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); }
@@ -108,8 +113,13 @@
     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); }
@@ -123,8 +133,13 @@
     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); }