[Arkshine]

Can you please write a simple test plugin which reproduces the error it happens for you, so I can try to debug what it's happening.

EDIT: Just in case, I've put some debug to see if ammo index of all weapons were properly retrieved and there is no issue:

Spoiler

Retrieved id: 1 , ammo index: 9
Retrieved id: 3 , ammo index: 2
Retrieved id: 4 , ammo index: 12
Retrieved id: 5 , ammo index: 5
Retrieved id: 6 , ammo index: 14
Retrieved id: 7 , ammo index: 6
Retrieved id: 8 , ammo index: 4
Retrieved id: 9 , ammo index: 13
Retrieved id: 10 , ammo index: 10
Retrieved id: 11 , ammo index: 7
Retrieved id: 12 , ammo index: 6
Retrieved id: 13 , ammo index: 4
Retrieved id: 14 , ammo index: 4
Retrieved id: 15 , ammo index: 4
Retrieved id: 16 , ammo index: 6
Retrieved id: 17 , ammo index: 10
Retrieved id: 18 , ammo index: 1
Retrieved id: 19 , ammo index: 10
Retrieved id: 20 , ammo index: 3
Retrieved id: 21 , ammo index: 5
Retrieved id: 22 , ammo index: 4
Retrieved id: 23 , ammo index: 10
Retrieved id: 24 , ammo index: 2
Retrieved id: 25 , ammo index: 11
Retrieved id: 26 , ammo index: 8
Retrieved id: 27 , ammo index: 4
Retrieved id: 28 , ammo index: 2
Retrieved id: 29 , ammo index: -1
Retrieved id: 30 , ammo index: 7

[JusTGo]

idk what happen but bug doesn't seem to occur any more didn't change anything.

[Arkshine]

If it happens again, tell me, and I will give you binaries with the above debug to see if WeaponList is well retrieved. The only way I see it fails is a plugin/module messing up with this message.

[Whitez]

Tested on zp 5.0.8a, and git 5057, didn't happen to me
Try to perform a clean installation of both amxmodx 1.8.3 build 5057 and zp 5.0 patched