If your IP address and network is correctly, check all firewall and Windows protection systems (allow software through public and private network). If the problem is still present, like you can upload race from another computer but the time does not synchronize with the Master computer: reset all your network cards.
Type netsh winsock reset and press Enter.
Type netsh int ip reset and press Enter.
Type ipconfig / release and press Enter.
Type ipconfig / renew and press Enter.
Type ipconfig / flushdns and press Enter.
After that, you will have to reenter the IP addresses on each computer.
Reset the TCP / IP stack Release the IP address Renew IP addressClear and reset the DNS client resolver cache To run these network commands in a command prompt window In the taskbar search box, type command prompt, long-press (or right-click) Command Prompt, and then select Run as administrator> Yes. In the command prompt, run the following commands in the order that they appear, and then check to see if this resolves the connection problem:
I you have high noise level on your decoder it will prevent the detection of any transponder. The noise is caused by electromagnetic sources (power supply, defective grounding, electrical cable nearby etc) or EMF (electromagnetic field). If the noise is too high:
Check the condition of your loop
Remove the electric cables near the loop
Check if there is no waterpipe or metallic construction nearby that could cause the high noise level
Do not wind up the coaxial cable
Check for defective electric devices by removing each unit one by one from the grid
Try shielded Coaxial cable
Your unit lost the GPS leap second. A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC) in order to keep its time of day close to the mean solar time. This parameters is send once during the 12.5-minute-long-navigation message. Let your unit run for at least 13 minutes and it should recover itself. Maybe restart your device after that time. The most recent leap second was inserted on December 31, 2016 at 23:59:60 UTC. eg. today we still have +18 seconds.