Problem: Your ACTool window displays the text "No Decal Interface" (on a black background) in the upper right of the ACTool window.

Solution: ACTool.exe can be started multiple times on your PC, but only one of the ACTool instances will have a valid Decal interface to the AC game client. Any attempt to start macros in the other ACTool's will not work.
In order to macro you need to either:

- close multiple ACTool windows until the only ACTool open is the original ACTool.exe that you started first
- ensure the macro you want to run is loaded in the ACTool window which doesn't display "No Decal Interface"