NPC Attack not working Properly

Hi, My battle system Code for My MMORPG seems to be bugged, and I can't seem to find the problem.

vb Code:

Public Sub BattleNPCAI(ByVal BattleSlot As Long, ByVal NpcSlot As Byte)
Dim Target As Long
Dim Damage As Long
Dim X As Long
Dim NpcNum As Long
Dim Index As Long
 
    Dim Name As String
    Dim EXP As Long
    Dim MapNum As Long
 
 
With Battle(BattleSlot)
 
If Not .Npc(NpcSlot).NpcNum > 0 Then
    Exit Sub
End If
 
'let's find a target huh?
If PlayersInBattle(BattleSlot) = 3 Then
    Target = Rand(1, 3)
ElseIf PlayersInBattle(BattleSlot) = 2 Then
    'there are two players... find the combinations?
    Target = Rand(1, 2)
        
    If Target = 1 Then
        If .Player(1).Index > 0 Then
            Target = 1
        ElseIf .Player(2).Index > 0 Then
            Target = 2
        End If
    End If
    
    If Target = 2 Then
        If .Player(3).Index > 0 Then
            Target = 3
        ElseIf .Player(2).Index > 0 Then
            Target = 2
        End If
    End If
    
ElseIf PlayersInBattle(BattleSlot) = 1 Then
    If .Player(1).Index > 0 Then
        Target = 1
    ElseIf .Player(2).Index > 0 Then
        Target = 2
    ElseIf .Player(3).Index > 0 Then
        Target = 3
    End If
    
Else
    Call Cle*****tle(BattleSlot)
End If
 
'let's start the attack...
 
'display that the npc is attackign someone...
    Index = Battle(BattleSlot).Player(Target).Index
    NpcNum = Battle(BattleSlot).Npc(NpcSlot).NpcNum
    Name = Trim$(Npc(NpcNum).Name)
    Damage = Npc(NpcNum).STR - GetPlayerProtection(Target)
    
    If Not IsPlaying(Index) Then
        Call LeaveBattle(Index)
        Exit Sub
    End If
    Call SendDataToBattle(BattleSlot, "NPCBATTLEATTACKPLAYER" & SEP_CHAR & NpcSlot & END_CHAR)
    
    If Damage <= 0 Then
        Damage = 1
    End If
    
    If Damage >= GetPlayerHP(Index) Then
        Call GlobalMsg(GetPlayerName(Index) & " was defeated by " & Name, BRIGHTRED)
        Call LeaveBattle(Index)
        If Map(GetPlayerMap(Index)).Moral <> MAP_MORAL_NO_PENALTY Then
            If SCRIPTING = 1 Then
                MyScript.ExecuteStatement "Scripts\main.ess", "DropItems " & Index
            Else
                If GetPlayerWeaponSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerWeaponSlot(Index), 0)
                End If
 
                If GetPlayerArmorSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerArmorSlot(Index), 0)
                End If
 
                If GetPlayerHelmetSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerHelmetSlot(Index), 0)
                End If
 
                If GetPlayerShieldSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerShieldSlot(Index), 0)
                End If
 
                If GetPlayerShieldSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerShieldSlot(Index), 0)
                End If
 
                If GetPlayerLegsSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerLegsSlot(Index), 0)
                End If
 
                If GetPlayerRingSlot(Index) > 0 Then
                    Call PlayerMapDropItem(Index, GetPlayerRingSlot(Index), 0)
                End If
            End If
 
            ' Calculate exp to give attacker
            EXP = Int(GetPlayerExp(Index) / 3)
 
            ' Make sure we dont get less then 0
            If EXP < 0 Then
                EXP = 0
            End If
        End If
 
        ' Warp player away
        If SCRIPTING = 1 Then
            MyScript.ExecuteStatement "Scripts\main.ess", "OnDeath " & Index
        Else
            If Map(GetPlayerMap(Index)).BootMap > 0 Then
                Call PlayerWarp(Index, Map(GetPlayerMap(Index)).BootMap, Map(GetPlayerMap(Index)).BootX, Map(GetPlayerMap(Index)).BootY)
            Else
                Call PlayerWarp(Index, START_MAP, START_X, START_Y)
            End If
        End If
 
        ' Restore vitals
        Call SetPlayerHP(Index, GetPlayerMaxHP(Index))
        Call SetPlayerMP(Index, GetPlayerMaxMP(Index))
        Call SetPlayerSP(Index, GetPlayerMaxSP(Index))
        Call SendHP(Index)
        Call SendMP(Index)
        Call SendSP(Index)
 
        ' If the player the attacker defeated was a pk then take it away
        If GetPlayerPK(Index) = YES Then
            Call SetPlayerPK(Index, NO)
            Call SendPlayerData(Index)
        End If
    Else
        Call SetPlayerHP(Index, GetPlayerHP(Index) - Damage)
        Call SendHP(Index)
    End If
    
    Call SendBattleDamage(BattleSlot, Damage, Target, 0)
    Call SendBattleData(BattleSlot)
    Call SendDataToBattle(BattleSlot, "sound" & SEP_CHAR & "pain" & SEP_CHAR & Player(Index).Char(Player(Index).CharNum).Sex & END_CHAR)
 
 
End With
 
End Sub
 
Function GetPlayerProtection(ByVal Index As Long) As Long
    Dim ArmorSlot As Long, HelmSlot As Long, ShieldSlot As Long, LegsSlot As Long
 
    'GetPlayerProtection = 0
 
    ' Check for subscript out of range
    If IsPlaying(Index) = False Or Index <= 0 Or Index > MAX_PLAYERS Then
        Exit Function
    End If
 
    ArmorSlot = GetPlayerArmorSlot(Index)
    HelmSlot = GetPlayerHelmetSlot(Index)
    ShieldSlot = GetPlayerShieldSlot(Index)
    LegsSlot = GetPlayerLegsSlot(Index)
    GetPlayerProtection = GetPlayerDEF(Index) ' / 5
 
    If ArmorSlot > 0 Then
        GetPlayerProtection = GetPlayerProtection + Item(GetPlayerInvItemNum(Index, ArmorSlot)).Data2
        If GetPlayerInvItemDur(Index, ArmorSlot) > -1 Then
            Call SetPlayerInvItemDur(Index, ArmorSlot, GetPlayerInvItemDur(Index, ArmorSlot) - 1)
 
            If GetPlayerInvItemDur(Index, ArmorSlot) = 0 Then
                Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, ArmorSlot)).Name) & " has broken.", YELLOW, 0)
                Call TakeItem(Index, GetPlayerInvItemNum(Index, ArmorSlot), 0)
            Else
                If GetPlayerInvItemDur(Index, ArmorSlot) <= 10 Then
                    Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, ArmorSlot)).Name) & " is about to break! Dur: " & GetPlayerInvItemDur(Index, ArmorSlot) & "/" & Trim$(Item(GetPlayerInvItemNum(Index, ArmorSlot)).Data1), YELLOW, 0)
                End If
            End If
        End If
    End If
 
    If HelmSlot > 0 Then
        GetPlayerProtection = GetPlayerProtection + Item(GetPlayerInvItemNum(Index, HelmSlot)).Data2
        If GetPlayerInvItemDur(Index, HelmSlot) > -1 Then
            Call SetPlayerInvItemDur(Index, HelmSlot, GetPlayerInvItemDur(Index, HelmSlot) - 1)
 
            If GetPlayerInvItemDur(Index, HelmSlot) <= 0 Then
                Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, HelmSlot)).Name) & " has broken.", YELLOW, 0)
                Call TakeItem(Index, GetPlayerInvItemNum(Index, HelmSlot), 0)
            Else
                If GetPlayerInvItemDur(Index, HelmSlot) <= 10 Then
                    Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, HelmSlot)).Name) & " " & Trim$(Item(GetPlayerInvItemNum(Index, ArmorSlot)).Name) & " is about to break! Dur: " & GetPlayerInvItemDur(Index, HelmSlot) & "/" & Trim$(Item(GetPlayerInvItemNum(Index, HelmSlot)).Data1), YELLOW, 0)
                End If
            End If
        End If
    End If
 
    If ShieldSlot > 0 Then
        GetPlayerProtection = GetPlayerProtection + Item(GetPlayerInvItemNum(Index, ShieldSlot)).Data2
        If GetPlayerInvItemDur(Index, ShieldSlot) > -1 Then
            Call SetPlayerInvItemDur(Index, ShieldSlot, GetPlayerInvItemDur(Index, ShieldSlot) - 1)
 
            If GetPlayerInvItemDur(Index, ShieldSlot) <= 0 Then
                Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, ShieldSlot)).Name) & " has broken.", YELLOW, 0)
                Call TakeItem(Index, GetPlayerInvItemNum(Index, ShieldSlot), 0)
            Else
                If GetPlayerInvItemDur(Index, ShieldSlot) <= 10 Then
                    Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, ShieldSlot)).Name) & " is about to break! Dur: " & GetPlayerInvItemDur(Index, ShieldSlot) & "/" & Trim$(Item(GetPlayerInvItemNum(Index, ShieldSlot)).Data1), YELLOW, 0)
                End If
            End If
        End If
    End If
 
    If LegsSlot > 0 Then
        GetPlayerProtection = GetPlayerProtection + Item(GetPlayerInvItemNum(Index, LegsSlot)).Data2
        If GetPlayerInvItemDur(Index, LegsSlot) > -1 Then
            Call SetPlayerInvItemDur(Index, LegsSlot, GetPlayerInvItemDur(Index, LegsSlot) - 1)
 
            If GetPlayerInvItemDur(Index, LegsSlot) <= 0 Then
                Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, LegsSlot)).Name) & " has broken.", YELLOW, 0)
                Call TakeItem(Index, GetPlayerInvItemNum(Index, LegsSlot), 0)
            Else
                If GetPlayerInvItemDur(Index, LegsSlot) <= 10 Then
                    Call BattleMsg(Index, "Your " & Trim$(Item(GetPlayerInvItemNum(Index, LegsSlot)).Name) & " " & Trim$(Item(GetPlayerInvItemNum(Index, ArmorSlot)).Name) & " is about to break! Dur: " & GetPlayerInvItemDur(Index, LegsSlot) & "/" & Trim$(Item(GetPlayerInvItemNum(Index, LegsSlot)).Data1), YELLOW, 0)
                End If
            End If
        End If
    End If
End Function
 
Function GetPlayerDEF(ByVal Index As Long) As Long
    Dim Add As Long
    Add = 0
    If GetPlayerWeaponSlot(Index) > 0 Then
        Add = Item(GetPlayerInvItemNum(Index, GetPlayerWeaponSlot(Index))).AddDef
    End If
    If GetPlayerArmorSlot(Index) > 0 Then
        Add = Add + Item(GetPlayerInvItemNum(Index, GetPlayerArmorSlot(Index))).AddDef
    End If
    If GetPlayerShieldSlot(Index) > 0 Then
        Add = Add + Item(GetPlayerInvItemNum(Index, GetPlayerShieldSlot(Index))).AddDef
    End If
    If GetPlayerHelmetSlot(Index) > 0 Then
        Add = Add + Item(GetPlayerInvItemNum(Index, GetPlayerHelmetSlot(Index))).AddDef
    End If
    If GetPlayerLegsSlot(Index) > 0 Then
        Add = Add + Item(GetPlayerInvItemNum(Index, GetPlayerLegsSlot(Index))).AddDef
    End If
    If GetPlayerRingSlot(Index) > 0 Then
        Add = Add + Item(GetPlayerInvItemNum(Index, GetPlayerRingSlot(Index))).AddDef
    End If
    If GetPlayerNecklaceSlot(Index) > 0 Then
        Add = Add + Item(GetPlayerInvItemNum(Index, GetPlayerNecklaceSlot(Index))).AddDef
    End If
    GetPlayerDEF = Player(Index).Char(Player(Index).CharNum).DEF + Add
End Function

In Battle, no matter how much DEF you got, Damage = NPC STR. Instead of Damage = NPC.STR - GetPlayerProtection. Any Help?

What exactly is the bug?

If Damage always equals NPC.STR then GetPlayerProtection must be returning zero. I think I am understanding the problem. You can verify this.

1) On the following line, place a break point:
If IsPlaying(Index) = False Or Index <= 0 Or Index > MAX_PLAYERS Then

2) Walk your code and see if the function is returning a value other than zero. The Debugging Tutorial may be of use here

Hmm it says GetPlayerProtection = 0... My defense is 3 though. I don't see why it's doing that, it was working before, somehow it started doing this randomly. Any Suggestions?

Yes, walk/F8 your code and find out why it is returning zero. See the debugging tutorial reference I gave you if you don't really know what I'm talking about.

Edited: I'm sure many of us would love to be of more assistance. But your GetPlayerProtection function calls too many other properties/routines that we have no knowledge of.