MC3 - Server unavailable

V5 Question
1

Hi All,

I am trying to connect the MC3 app on my ipad to the server and I am constantly getting ‘Server Unreachable’ message. I have tried this on 2 ipads and an iPhone.

mc3
mc31170×2532 169 KB

About 2 years ago I did manage to get MC3 to work, had some minor issues, but had to abandon that project due to other commitments.

I have now renewed my license and give it another try but cannot seem to get passed this error.

I have (several times)

  • Cleared licenses and re-ran the License manager
  • Restarted the server
  • Restarted Messenger Service
  • Turned off the firewall
  • Made sure the inbound/outbound rules for port 9000 in the firewall are active
  • Checked all of the steps in the Setup document including making sure messenger service is setup with port 9000+
  • Checked local settings and tested Messenger service which comes up connected
  • Checked PIN/Pwd is correct in the pda User setup
  • Made sure my Samba version is correct for use with MC3 (5.7.12)
  • Made sure the IP addresses on the server and ipad are in the same group (192.168.1.xxx)

The only change since 2 years ago is that we added a second workstation. I have successfully tested that this workstation can connect to the server’s messenger service.

Any ideas how to solve this, other than doing all of the above again

Regards

Tony

2

Mee too and I trying uninstall all windows updates 2026

3

The October 2025 Windows 11 cumulative update (KB5066835) introduced a regression in the kernel driver, silently breaking loopback HTTP/2 connections.

Check your installed updates via Windows Update > Update History and look for KB5066835 or the September preview KB5065789.

4

Hello @tstallan ,

You can continue using the MC3 after reactivating your SambaPOS V5 Pro License.

5

Thanks. That fixed the problem.

I do now have a new one but I will create a new topic

1 Like