Prosystem core not start Rikki & Vikki

Thanks for reading my topic.

I had played in Retroarch previous version the Prosystem core with Rikki & Vikki.

The game load and has music.

Retroarch previous and current version not load that game.

Need load an cdf file and after is loaded the game rom and music data.

When trying load the cdf file show error message not being possible load the files.

Prosystem core has correct firmwares files.

The cdf file internally is

====

ProSystem

SOUPER

Rikki & Vikki

FoxBox.bin

CORETONE

…\Music\RV_Samples.smp

…\Music\RV_Macros.ins

…\Music\RV_Rock_0.mus

…\Music\RV_Rock_1.mus

…\Music\RV_Rock_2.mus

…\Music\RV_Sand.mus

…\Music\RV_Flame.mus

…\Music\RV_Bubble.mus

…\Music\RV_Metal.mus

…\Music\RV_Dut.mus

…\Music\RV_DutWarp.mus

…\Music\RV_Boss_S.mus

…\Music\RV_Boss_C.mus

…\Music\RV_Misery_S.mus

…\Music\RV_Misery_C.mus

…\Music\RV_Misery_F.mus

…\Music\RV_Title.mus

…\Music\RV_Menu.mus

…\Music\RV_Story.mus

…\Music\RV_GameOver.mus

…\Music\RV_HighScore.mus

…\Music\RV_Clear_R.mus

…\Music\RV_Clear_V.mus

…\Music\RV_Clear_C.mus

…\Music\RV_Clear_F.mus

…\Music\RV_Linguistic.mus

…\Music\RV_Never_Lose.mus

…\Music\RV_Together.mus

…\Music\RV_Staff.mus

…\Music\RV_End.mus

…\Music\RV_Dissolve_0.mus

…\Music\RV_Dissolve_1.mus

…\Music\RV_Irregular.mus

…\Music\RV_Dissolve_3.mus

====

That same cdf file load correctly using the BupSystem emulator.

Retroarch 1.16 had added the new feature below

CONFIG: Allow all systems to check for backslashes (Windows) as last slash in path. Improves portable core logic

Perhaps that new feature has broken Prosystem cdf support ?

How fix it ?