Make sure that the ports 55955 to 55959 are available (open) on your LAN for the below applications:
Port 55955= used by PROSOFT
Port 55956 = GUI; GUI+; iSGUI and Diagnostics
Port 55957 = TDS15132 Open DoIP software license
Port 55958 = comm. between centrale units if more than one (multiple central units in one nbt file).
Port 59959 = log information for GUI+ and PROSOFT, and ‘reload GUI data’ in iSGUI and GUI+.
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