I can’t seem to post this in the announcement thread so here goes.
I can connect to my LTAP Mini just fine using Winbox 3. Winbox 4 however, different story. Using exactly the same connection details, I get the error below. Any insight on how to fix this?
Looks like you are connecting to the MAC address. This type of connection should only be used when no other connection is available. Try to use the IP address of the unit first. Also, MAC connection is much less reliable and is more sensitive to network latency. Try to close Winbox completely, then try again.
I see exactly the same on a device behind a slow connection.
WB3 connects
WB4 does not connect and give this error
We found the issue, it is so, like you said. If there is high latency, MAC connection can be broken.
Original topic author, please use IP if available.
While using IP to connect to this slow responding device
wb4 is stuck with this message and is not getting out of this.
wb3 sometimes opens a “blank” connection (all open windows empty) but after a 2nd try, it opens normally
I have got the same error with version 4.0 beta13 while connecting to fully reset router RB4011 via MAC as cannot connect to 0.0.0.0 
. If I use old good winbox no problems. Its Winbox 4 bug.
Hi,
Same here and I took time to understand.
While playing with my Mikrotik, as soon as I have no IP anymore, I can’t connect anymore with Winbox v4.0 beta 18.
With Winbox v3, no issue.
It may not be “normal” to have no IP, but I can’t be locked away as soon as I have a wrong configuration. 