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:
hopefully this helps others as well.
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  tap: add_tapdev(Hamachi) 12/12 17:08:41.508  tap: list_netdev_win32() .. 12/12 17:08:41.579  vpn: adding tap device [Hamachi] .. 12/12 17:08:41.608  tap: DiInstallDevice query 12/12 17:08:41.642  tap: Collecting information... 12/12 17:08:41.699  tap: Installing driver, step 1 .. 12/12 17:08:41.718  tap: Installing driver, step 3 .. 12/12 17:08:41.974  tap: Installing driver, step 4 .. 12/12 17:08:41.989  tap: Installing driver, step 4 .. 12/12 17:12:27.769  tap: Error while installing hamachi: DiInstallDevice failed with code 000005b4 12/12 17:12:27.815  tap: Done, 1460 12/12 17:12:27.828  tap: add_tapdev() failed
Windows 10, Hamachi 126.96.36.1995
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?
@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?
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