[Closed] Unreliable executed code though dotNet tcp server

Hello,

I’m trying to make a python program communicate with maxscript.
I made a dotNet tcp server in maxscript, and a I am using the python socket library to send data from my client.
The problem is that the first time I send the

saveMaxFile

command I get an

Unknown system exception

.
But the second time it’s sent, there is not problem.
Also, sending

resetMaxFile() #noprompt

always get me the same exception, but for commands like creating objects I don’t have any problem.
Does anyone ever encoutered this problem ?

Code :

MaxScript server :

fn createServer ipAddress port = 
(
	dotNetIPAddress = (DotNetClass "System.Net.IPAddress").Parse ipAddress
	tcpListener = DotNetObject "System.Net.Sockets.TcpListener" dotNetIPAddress port
	tcpListener.Start()s
	msgReceived = ""
	print ("listening on " + (ipAddress as string) + ":" + (port as string))
	while true do 
	(
		print("waiting for a client socket")
		socket = tcpListener.AcceptSocket()
		print("client socket accepted")
		while msgReceived != "exit" do
		(
			sendByteStream = DotNetObject "System.Byte[]" 10000
			socket.Receive sendByteStream
			encoding = DotnetClass "System.Text.UTF8Encoding"
			msgReceived = trimright (encoding.UTF8.GetString(sendByteStream))

			if msgReceived == "socketClosing" then (
				print("closing socket")
				socket.Close()
				exit
			)
			else (
				if msgReceived != "" then (
					print("execute : " + msgReceived)
					-- execute msgReceived
					try(
						result = execute(msgReceived)
					) catch (
						error_str = "" + getCurrentException() +"
" 
						print(error_str)
					)
					-- send result
					ascii_encoder = dotNetObject "System.Text.ASCIIEncoding"
					bytes = ascii_encoder.GetBytes (result as string)
					result = socket.Send bytes
				)
			)
		)
	)
)

fn BackgroundTcpListenerDoWork theSender theEvent =
(
	ipAddress = "127.0.0.1"
	port = 7500
	try (
		createServer ipAddress port
		exit
	)
	catch(
		print("server crashed or port " + (port as string) + " is already used")
	)
)

BackgroundWorker = DotNetObject "System.ComponentModel.BackgroundWorker"
DotNet.AddEventHandler BackgroundWorker "DoWork" BackgroundTcpListenerDoWork
BackgroundWorker.WorkerSupportsCancellation = true
BackgroundWorker.RunWorkerAsync()

Python client :

import socket


def sendMessage(msg, socket):
	socket.send(msg)
	return s.recv(responseBufferSize)

## connect to the server
responseBufferSize = 1024
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 7500))

## send messages
sendMessage('saveMaxFile "C:/test.max"', s)
sendMessage('saveMaxFile "C:/test.max"', s)

## close the socket from server and client side
sendMessage('socketClosing', s)
s.shutdown(socket.SHUT_RDWR)
s.close()

To test, first execute the maxscript server code, and then the python one.

thank you