Running on a new Windows install. I installed tera Term and copied over a .ttl file I used on a previous windows version. When I try to launch the macro I get an Invalid Host pop-up error.
I can open Tera Term as normal and connect to the host defined in my .ttl file without any problems, it's only when I try to run my script.
I've tested this on both Tera Term Version 4.78 as well as Version 4.105
After some messing around I managed to solve this problem, giving it a real answer so that hopefully if someone else has this problem they will find this.
The problem was that by default my .ttl files were set to open with Tera Term I instead had to set it to open with Tera Term Macro Interpreter, which is an executable that lives in your Tera Term install directory.