#24 App crash in case the RTU server fails to start

[Antonio Bartalesi]

In case the modbus RTU server is created with wrong parameters, or in case the user does not have permission to open the serial devices; when clicking connect the app gives the following error:
ERROR modbus._run_server Thread-1 server error: [Errno 13] Permission denied
However, the status is displayed as connected, and clicking disconnect crashes the app with the following traceback:

Traceback (most recent call last):
  File "/home/user/pymodslave/pyModSlave.py", line 305, in _start_stop
    self.svr.stop()
  File "/home/user/pymodslave/modbus_tk/modbus.py", line 918, in stop
    if self._thread.isAlive():
AttributeError: 'Thread' object has no attribute 'isAlive'
Aborted (core dumped)

[elbar]

Hello.

Thanks for writing in. I will fix the bug asap.

Best Regards