When you scrape, it may happen that the database on which you scrape, returns boxbacks of green colors when no boxback is present.
It is possible with ARRM to ignore them when scraping.
Since version 1.9.2.5 Beta 1, simply edit the file %appdata%\Nexouille soft\arrm\database\boxback_filesize.txt indicating the size in bytes of the empty boxback file
Once the file has been modified, remember to restart ARRM.