[Wintermute0110]

Im unsing libreELEC on a Raspberry PI 4 (4GB)
I get an error message at launch of AML.

MAME Catalog database needs to be built. Use the context menu "Setup plugin" in root window.

Where is the "root window" and how to setup the database?
i try`d to set up on the AML in the settings, but what is the path?
I don`t have the /home/... directory, just have the / (root) directory.
I also install the emulator Add-on´s, but what is the path to the emulator?

The root windows is the main window of AML, is the window that first opens when you enter AML.

The first thing you need is to install MAME on LibreELEC. AML only works with external vanilla MAME, it does not work with Retroplayer's MAME cores yet. Ask for help in the LibreELEC forum about how to install MAME first. Once MAME is installed, you need to know the location of the MAME executable. Also, you will need some writable directories to place the DAT files, ROM ZIPs, artwork, etc.

EDIT: in this page I learned that the user home directory in LibreELEC is /storage/. You can then create the following directories to setup AML

Code:

/storage/AML-ROMs/
/storage/AML-DATs/
/storage/AML-assets/
etc.

But remember that first you need to install vanilla MAME.