Cannot pass ArrayBuffer or Uint8Array and get meaningful data back

[WorkMAE]

Here is what I am trying to do...I have several binary files I am reading in, need to join them together ultimately and would like to use VKThreads for the processing of them.
However, I cannot get this to work. If I try and pass in the arrayBuffer data directly and put the line var data = new Uint8Array(dataArr) in the runThread function, I get a return of an empty array. If I pass in the already converted Uint8Array as I have done, I get an error:

"Worker error: Uncaught TypeError: Cannot read property 'uint8array' of undefined at Worker.worker.onerror"

Is there any support for Transferrable Objects in vkThreads? If not is there any way to get this to work? I may have to use a normal webWorker if not it appears unfortunately...

               var spawn = vkThread();
                function runThread(dataArr) {                        
                    var workbook = XLSX.read(dataArr, { type: "array" });
                    var myJSON = XLSX.utils.sheet_to_json(workbook.Sheets.Sheet1);
                    return myJSON;
                };

                    user.readBinary(CVData.path + num + '.xlsb').then(function (response) {
                        var data = new Uint8Array(response);
                        var param = {
                            fn: runThread,
                            args: [data],
                            importFiles: ['https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.13.0/xlsx.full.min.js']
                        };

                        spawn.exec(param).then(function (threadData) {
                            data.push(threadData);
                        }, function (err) {
                            alertify.error('There was an error running this thread! Error: ' + err);
                            });

                    });