diff -r a59ecd6d72f4 -r 30abc8024afe www/js/prod_divide.js
--- a/www/js/prod_divide.js	Sun Jun 13 19:36:42 2021 +0200
+++ b/www/js/prod_divide.js	Fri Jun 18 15:26:55 2021 +0200
@@ -39,7 +39,7 @@
     leftover = Round(available, 1);
     for (i = 0; i < rows.length; i++) {
      row = rows[i];
-     leftover -= row.split_size;
+     leftover = Round(leftover - row.split_size, 1);
      console.log('i:' + i + ' split_size:' + row.split_size);
     }
     $('#leftover').val(leftover);
@@ -298,7 +298,6 @@
    $('#stage').val(StageData[dataRecord.stage].nl);
    // Disable stages that are already done.
    for (i = 0; i < SplitData.length; i++) {
-    console.log('i:' + i + ' ok:' + SplitData[i].ok + ' stage:' + dataRecord.stage);
     if (SplitData[i].ok < dataRecord.stage)
      $('#divide_type').jqxDropDownList('disableAt', i);
    }
@@ -363,7 +362,7 @@
      id = $('#splitGrid').jqxGrid('getrowid', rowscount - 1);
      // First, give back this batch volume.
      row = $('#splitGrid').jqxGrid('getrowdata', id);
-     leftover += row.split_size;
+     leftover = Round(leftover + row.split_size, 1);
      if (leftover > available)
       leftover = available;
      $('#leftover').val(leftover);
@@ -440,7 +439,6 @@
     break;
   }
   leftover = available;
-//  minvolume = Round(0.1 * available, 1);  /* What was the use for this ?? */
   console.log('divide_type:' + index + ' available:' + available);
   $('#available').val(available);
   $('#leftover').val(leftover);
@@ -459,7 +457,10 @@
  $('#Save').jqxButton({ template: 'success', width: '80px', theme: theme });
  $('#Save').bind('click', function() {
   var rows, row, i, div, data;
-  if (leftover != available) {
+  if (! leftover) {
+   console.log('Save and no volume left');
+   alert('Fout, er is geen volume over in de hoofd batch.');
+  } else if (leftover != available) {
    console.log('Save and there are splits');
 
    // Send all the info to the database. The server handles the splitting.
@@ -498,15 +499,19 @@
      cache: false,
      data: data,
      type: 'POST',
-     success: function(data, status, xhr) {
-      console.log('insert divides: success');
+     success: function(data) {
+      if (data.error) {
+       console.log('insert divides: error ' + data.msg);
+       alert('Fout: ' + data.msg);
+      } else {
+       console.log('insert divides: success');
+      }
       window.location.href = my_return;
      },
      error: function(jqXHR, textStatus, errorThrown) {
       console.log('insert divides: ' + textStatus);
      }
    });
-
-  }
+  } // if (leftover != available)
  });
 });