You're defining the aceax_rahim class twice, which is not allowed in Arma 3. That's exactly why the "member already defined" error shows up.

@Sheliz can you give me the exact error you get?

please fix

in aceax_rf.pbo you are defining the "aceax_rahim" class twice

Wow, what happened? I can't even open the game

There are several bugs.

Weapons:
- AKU-12: confused camos;
- RPK-15: in config has the wrong models (AK-12) [not displayed]
- Rahim: Black variants from Aegis (SV-122) and from RF has identical configs [SV-122 is not displayed]
- Type 115: Hex and GHex variants are swapped

Helmets:
- Avenger: RF variants (with "Shape Breaker") missed "camo2" field in configs [not displayed]
- Ballistic Mask: 1 variant is not included
- Luchnik: Ardistan, WHex and SFIA variants are not included

Uniforms:
- Cold Weather Fatigues (from IHWCU mod): labels "Camo" and "Variant" are swapped; Woodland variant is not included
- Operator Outfit: has classes "camo" and "camo2", but Revolution add new variants to "variant" that hasn't label
- CTRG Stealth Uniform: Tee-variants are not included; Djeballa-variant is not displayed
- Parade Uniform: CSAT Canada is not included

NVG:
- Armband: class "armband_nvg" instead of "aceax_armband_nvg" [not displayed]