smb2Client.open('test.txt', 'w' ... is error

[binghe17]

---------- demo_samba.js

...

smb2Client.open('test.txt', 'w', function(err, fd) {
if (err) throw err;

  smb2Client.write(
      fd, // file descriptor
      Buffer.from('asdf'), // data to write to the file
      0, // offset in the buffer
      10, // number of bytes to write
      0, // offset in the file
      function(err, bytesWritten, buffer) {
          smb2Client.close(fd, function() {});

          if (err) throw cb(err);
          console.log(bytesWritten);
      }
  );

});

---

`
PS C:\Users\USERNAME\Desktop\node\test\image-download-main> node demo_samba.js
assert.js:383
throw err;
^

AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:

assert(offset > 0)

    at module.exports.write (C:\Users\USERNAME\Desktop\node\test\image-download-main\node_modules\@marsaud\smb2\lib\api\write.js:13:5)
    at module.exports.write (C:\Users\USERNAME\Desktop\node\test\image-download-main\node_modules\@marsaud\smb2\lib\tools\auto-promise.js:30:8)
    at C:\Users\USERNAME\Desktop\node\test\image-download-main\demo_samba.js:177:16
    at C:\Users\USERNAME\Desktop\node\test\image-download-main\node_modules\@marsaud\smb2\lib\tools\smb2-connection.js:153:8
    at Object.04000000 (C:\Users\USERNAME\Desktop\node\test\image-download-main\node_modules\@marsaud\smb2\lib\tools\message.js:15:15)
    at Socket.<anonymous> (C:\Users\USERNAME\Desktop\node\test\image-download-main\node_modules\@marsaud\smb2\lib\tools\smb2-forge.js:71:31)
    at Socket.emit (events.js:315:20)
    at addChunk (internal/streams/readable.js:309:12)
    at readableAddChunk (internal/streams/readable.js:284:9)
    at Socket.Readable.push (internal/streams/readable.js:223:10) {
generatedMessage: true,
code: 'ERR_ASSERTION',
actual: false,
expected: true,
operator: '=='
}

`