Hi, kindly need your support in below,   I have Text file, I have to convert it to byteArray and send it through REST API, I tried many ways to convert the file to byteArray, last one is: - ExecuteScript with below code: import base64 import codecs with codecs.open('/path/to/input/file.txt', 'r', encoding='utf-8') as file: file_content = file.read() file_bytes = file_content.encode('utf-8') encoded_bytes = base64.b64encode(file_bytes) encoded_string = encoded_bytes.decode('utf-8') flowFile = session.putAttribute(flowFile, 'fileContent', encoded_string) session.transfer(flowFile, REL_SUCCESS)   but still get error: utf-8' codec can't decode byte 0xff in position 0: unexpected code byte in <script> at line number 6   REST API Config: HTTP Method: POST API URL:..... Request Content-Type: application/octet-stream authentication User: username  authentication password: password   we applied it in VB.net as below: Function CallApi(APIURL As String,filepath As String) As String Dim req As WebRequest = WebRequest.Create(APIURL) Dim txtfile = File.ReadAllBytes(filepath"file.txt") System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12 ServicePointManager.ServerCertificateValidationCallback = AddressOf AcceptAllCertifications req.Headers("Authorization") = "Basic " & Convert.ToBase64String(Encoding.[Default].GetBytes("username:password")) req.Method = "POST" req.ContentType = "application/octet-stream" Dim byteArray As Byte() = txtfile req.ContentLength = byteArray.Length Dim dataStream As Stream = req.GetRequestStream() dataStream.Write(byteArray, 0, byteArray.Length) dataStream.Close() ' response Dim resp As WebResponse = req.GetResponse() Dim s As Stream = resp.GetResponseStream() Dim sr As StreamReader = New StreamReader(s, Encoding.UTF8) Dim doc As String = sr.ReadToEnd() Return doc End Function Any suggestions may help me to achieve this? ... View more