Xbox360 right joystick not recognized by MAME (tank games)

[knuckle99]

There are two MAME games I really enjoy - Assault and Vindicators.
Both of these games are tank based so you normally play with two joysticks - one for each tank track.
On the PC, the Xbox360 controller can be mapped in game so the right joystick is the right track on the tank.
Using MAME on the Recalbox, I cannot get the games to recognize the right joystick when I try and remap the controls in game. Under Controller Settings, the right joystick is recognized but the mapping does not transfer to the MAME games.
Any solutions to this?
Thanks!

[voljega]

Wait for 4.1 which will bring many bug corrections for mame, especially for custom controls, but i fear this will not be possible on Recalbox as the right joystick is never set nor used for the whole system

[acris]

You need to enable, may be, core per game option in retroarch menu.