no , you are helpful.
-i have really no idea what is wrong ,i verify every folder structure/names/caps/size
-i will do more test by replacing some images by snaps or titles (less Mo) from fba who works , also taking the same playlist structure from fba (just roms change and .lpl name)
- i verify the database for mame2003 plus qnd the names of the roms/snaps ard there !
will see
It's been a while not commenting to help others as a true gamers.
I think I know the problems that you're facing.
First thing first. Open your retroarch location as below and pay attention on two important folders which deals with "Thumbnails".
Folder Number 1.
As you can see that my playlist folder contain a file by name "MAME 2003-Plus.lpl" this is the name of the MAME 2003 cores that I use to play The Most Outstanding Classic Arcade Coin Up Games for me.
Folder Number 2.
The second folder that you're going to deals with is the "Thumbnails" Folder. As you can see I have also one file in this folder and its called "MAME" in it you will have three main folders called as "Named_Boxarts - Named_Snaps - Named_Titles".
Now your problems is on the folder number 1 (the first image that i upload).
in your "Playlist" folder the output for the thumbnail that was generated by whatever programs that you use was pointing out to a different location, so the RetroAch system cannot locate it.
now what you need to do is to "REGENERATE" you playlist for MAME I Suppose by using The RetroArch PlayList.
and follow my RetroArch Playlist Buddy Configuration (NOTE: All You need is to copy the drive location where you put all the Retroach files). Here's my configuration:
after you choose the next step, it will then point out where you put your MAME Romset.
AND THIS IS THE MOST IMPORTANT PART OF ALL: The generated files of this Program (The RetroArch Playlist Buddy) will be found in your Retroarch "Playlist" Folder. What you need to do next is to reconfirm the db_name /database name into the right Thumbnails name. For MAME 2003 Plus the thumbnail names must be MAME also.
and your good to go.