Oracle apex upload images ajax CLOB_CONTENT not filled

Question

I'm working with 4.2.5.00.08 on Oracle 12.1.0.2- 64 on Windows.
What am I doing wrong with this code.
I created a HTML5- dropbox to upload an image
This "always" worked, but now I don't seem to get it working again.
To be exact: the C001 column of the CLOB_CONTENT stays empty.
I have the feeling I'm overlooking something, but I can't put my finger on it.
Someone who sees the problem?
ON DEMAND PROCES : dummy
begin
  insert into m2b_images
    ( id, blob_content
  select 1
  ,      apex_web_service.clobbase642blob
                ( dbms_lob.substr( col.clob001
                                ,  dbms_lob.getlength(col.clob001)
                                , dbms_lob.instr(col.clob001,',',1,1) + 1
  from   apex_collections col
  where  col.collection_name = 'CLOB_CONTENT'
  and    col.c001 is not null;
exception
  when others
  then
    rollback;
    htp.p(sqlerrm);
end;
Javascript on the page (on the page there's a div dropbox and a div droplabel)
<script>
(function dropboxFunctionality() {
  var dropbox;
  function dragExit(evt) {
    evt.stopPropagation();
    evt.preventDefault();
  function dragEnter(evt) {
    evt.stopPropagation();
    evt.preventDefault();
  function dragOver(evt) {
    evt.stopPropagation();
    evt.preventDefault();
  function handleReaderLoadEnd(evt) {
    var clobObj = new apex.ajax.clob(function (p) {
      if (p.readyState == 4) {
        $("#droplabel").html("Uploading...");
        var get = new htmldb_Get(null, $v('pFlowId'), 'APPLICATION_PROCESS=dummy', $v('pFlowStepId'));
        gReturn = get.get();
        if (gReturn === "") {
          $("#droplabel").html("Ready...");
        } else {
          alert(gReturn);
    clobObj._set(evt.target.result);
  function handleFiles(files) {
    var file, reader;
    file = files[0];
    $("#droplabel").html("Processing " + file.name + "...");
    reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onloadend = handleReaderLoadEnd;
  function drop(evt) {
    var files, count;
    evt.stopPropagation();
    evt.preventDefault();
    files = evt.dataTransfer.files;
    count = files.length;
    if (count > 0) {
      handleFiles(files);
  if (window.File && window.FileList && window.FileReader) {
    dropbox = document.getElementById("dropbox");
    $("#P2_FILE_NAME").hide();
    $('#P2_UPLOAD').hide();
    dropbox.addEventListener("dragenter", dragEnter, false);
    dropbox.addEventListener("dragexit", dragExit, false);
    dropbox.addEventListener("dragover", dragOver, false);
    dropbox.addEventListener("drop", drop, false);
  } else {
    $("#dropbox").hide(); //No drag and drop supported. Hide the container
</script>

Answer 1

really? Nobody saw that i checked for the wrong column c001 instead off clob001.
ah well