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New Contributor

Yellow Triangle shown when attempting to connect

I'm on Windows 10 and there's always a yellow triangle next to the network in Hamachi. It says it is a tunnel problem. How can I fix this? 

183 REPLIES 183
New Contributor

Captura de pantalla 2018-09-25 a la(s) 19.24.25 copia.jpg

tengo un error al inciar hamachi en mac, despues de instalar la aplicacion

I have an error when starting hamachi on mac, after installing this ad aprece

GoTo Manager

Hi @Dickerson


The error "Failed to connect to engine" is caused by the LogMeIn Hamachi Tunneling Engine either failing to start, being in an error state, or being blocked by anti-virus software. If your anti-virus software is reporting/blocking Hamachi-2-ui.exe, you will need to add an exclusion for the Hamachi-2-ui.exe program.  Please consult your anti-virus software documentation for assistance with adding an exclusion to the allowed list.


On Mac please try the steps posted by @cbrough 


Our solution was:

  1. open system preferences > users & groups > login items
  2. Logmein hamachi showed a yellow yeild sign and "unknown"
  3. select logmein hamachi and press the "-" below to remove from startup items.
  4. restart computer. hamachi opens and connects fine.

hopefully this helps others as well.

Glenn is a member of the GoTo Community Care Team.

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New Contributor

I've found some similar issues on the forum, but I can't find exactly like mine. After installation of Hamachi, there is no adapter in the device manager. When I try to add it manually I've got this error:


C:\Program Files (x86)\LogMeIn Hamachi\x64>hamachi-2.exe --add-tap "Hamachi"
12/12 17:08:41.493 [20024] tap: add_tapdev(Hamachi)
12/12 17:08:41.508 [20024] tap: list_netdev_win32() ..
12/12 17:08:41.579 [20024] vpn: adding tap device [Hamachi] ..
12/12 17:08:41.608 [20024] tap: DiInstallDevice query
12/12 17:08:41.642 [20024] tap: Collecting information...
12/12 17:08:41.699 [20024] tap: Installing driver, step 1 ..
12/12 17:08:41.718 [20024] tap: Installing driver, step 3 ..
12/12 17:08:41.974 [20024] tap: Installing driver, step 4 ..
12/12 17:08:41.989 [20024] tap: Installing driver, step 4 ..
12/12 17:12:27.769 [20024] tap: Error while installing hamachi: DiInstallDevice failed with code 000005b4
12/12 17:12:27.815 [20024] tap: Done, 1460
12/12 17:12:27.828 [20024] tap: add_tapdev() failed

Windows 10, Hamachi


New Contributor


New Contributor

When I try to use Hamachi I am greeted with the yellow triangle of death. This is the result of the failed network adapter I believe. The problem is mine is gone and is not visible in device manager. When I try to manually install it using the add hardware wizard the download fails. I have tried reinstalling and rebooting several times, does anyone have a solution?

GoTo Moderator

@Missinglow  Typically when we hear about this scenario, it will be caused by an out of date operating system or poor certificate therein.  Have you doublechecked the affected OS to confirm everything has been updated? 

Ash is a member of the GoTo Community Care Team.

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New Contributor

Try fully removing hamachi and installing it on yout system drive

New Contributor

Hello, yesterday i asked to my internet provider to gave me a public ip. After changing it, hamachi stopped working on every server i was connected in. On the diagnostic tool it shows me a yellow triangle near tunnel (Dettagli peer (Peer details):
LAPTOP-RHP76IJ5 Offline (Offline)

The network shows no internet access too.
Ps. I have already tried to uninstall and install again

New Contributor

There the F is the "Administrative Tools" on the Mac? This is what this is for. MAC USERS!
New Contributor

Strange..I have this problem on a brand new laptop. No Virus software is running.