beremiz

f273ee835411
PLCOpen editor: fix exception when using file open dialog

Consequence of wxPython 3 to 4 API changes.
<?xml version='1.0' encoding='utf-8'?>
<ModbusServerNode xmlns:xsd="http://www.w3.org/2001/XMLSchema" Local_Port_Number="1502" Local_IP_Address="127.0.0.1" Configuration_Name="Modbus TCP Server 0.1"/>