Unexpected SuiteScript error” while uploading a file to an SFTP server in NetSuite

Encountering an Unexpected SuiteScript Error When Uploading a File to SFTP using the script:

function xmlFileCreation(xmlContent, recId, recordType) {
            try {
                log.debug("recordType**2", recordType)
                let nowDate = new Date();
                log.debug("nowDate", nowDate);
                let xmlFileName = 'CORP_XML_ITEM' + "_" + recId + "_" + nowDate + '.xml';
                log.debug("xmlFileName", xmlFileName);



                let xmlFile = file.create({
                    name: modifiedFileName,
                    fileType: file.Type.XMLDOC,
                    contents: xmlContent,
                    description: 'Material xml file.',
                    encoding: file.Encoding.UTF8,
                    folder: 398248,              //change
                    isOnline: true
                });
                let xmlid = xmlFile.save();

                setSftpConnection(xmlid, recId, recordType);

            } catch (e) {
                log.debug("error@xmlFileCreation", e.message)
                return false;
            }
        }

function setSftpConnection(xmlid, recId, recordType) {

 //Creating connection to SFTP
          let userName = 'jobinandjismi';
          let passwordGuid = 'ec8e2cc9ba12497280388c7e22012c14';
          let url = 'sftp.corpdesign.com';
          let hostKeyString = 'AAAAB3NzaC1yc2EAAAABIwAAAIEAs2E5nCxBe4M6cxCEYus+1UwQv9Mc21JlCmtpPDaS9A2itBuQms0CoRHR5UelKKN01yDr7u1MzVe5efGppchDcpQ0zu5bp/GcUOrj5LWnjxQg/PpGRo7QMOl194rEbVKGUGne0FmKUqTF48Xq69Ju7V0f7xgf++VCKAXicK/pqFc=';

                let connection = sftp.createConnection({
                    username: userName,
                    passwordGuid: passwordGuid,
                    url: url,
                    directory: '/',    // sftp folder for uploading xml file.
                    hostKey: hostKeyString
                });

                let materialXmlToUpload = file.load({
                    id: xmlid
                });


                // Upload the file to the remote server
                connection.upload({
                    directory: '/Material Files',     // sftp folder for uploading material xml files
                    filename: materialXmlToUpload.name,
                    file: materialXmlToUpload,
                    replaceExisting: true
                });
                log.debug("upload successfull")
}

The error was caused by the character “:”(Colon (:)) in the File Name. This can be resolved by removing colon from the file name as:

//replace character ":" from the filename
 let modifiedFileName = xmlFileName.replace(/:/g, '.');