UA AI Arty Script

[snafu]

Hello, all

I'm trying to use the following script for UA 1.11, but I'm getting 'Error unknown operator bool' when the AI tries to call fire.

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;----------------------------------------------------------
; Easy AI Unified Artillery
;
; By General Barron
; aw_barron@hotmail.com
; 8/11/04   v1.0
;----------------------------------------------------------
;
; NOTE: THIS SCRIPT REQUIRES THE CHAIN OF COMMAND'S UNIFIED ARTILLERY ADDON
;
; This script lets the specified AI call for artillery fire automatically.
;The AI will try to call arty whenever enemies are detected. They will
;only call a strike if no friendlies are within 75 meters of the target.
;
; To adjust how many rounds are fired per strike, as well as the radio
;chatter used, go to the bottom of this script.
;
; Note that this is a simple script, and the AI won't do things like adjust
;their aimpoints. I suggest you use the "zero bias error" gamelogic with this
;script, or else the arty strikes won't be very accurate. I also suggest you
;set the skill of the artillery units to 100%.
;
;      TO USE THE SCRIPT:
;
;Place a CoC Obelisk for whichever side(s) will be using the artillery.
;
;Place the following files in your mission directory:
;   ai_arty_ua.sqs
;   findUnits.sqf
;   knownUnits.sqf
;
;Place these lines in your init.sqs:
;   knownUnits = preprocessFile "knownUnits.sqf"
;   findUnits = preprocessFile "findUnits.sqf"
;
;Place this line in the init field of each AI artillery spotter:
;   [this, "enemy array name", "friendly array name", arty group name] exec "ai_arty_ua.sqs"
;
;"enemy/friendly array name" - the name of the arrays that will be considered
;   friendly/enemy to this observer. NOTE: This is the variable name IN QUOTES.
;   Note that you could also put civilians in the friendly array, to prevent AI from
;   causing civilian casulties.
;   I suggest that you DO NOT add your artillery units to the enemy array. Doing so could cause the AI to call
;   artillery down on the opposing side's artillery, without actually seeing where it is.
;   For info on why it must be in quotes, check here: http://www.ofpec.com/editors/comref.php?letter=3#Array%20assignment
;
;arty group name - group that is in the artillery guns. MAKE SURE TO PLACE THIS GROUP BEFORE
;    PLACING OTHER UNITS. Otherwise, the group might not "exist" yet before the script is executed.
;
;EXAMPLE: Place a trigger, activation: west present. On activation: west_units = thislist
;   Place another trigger, activation: east present. On activation: east_units = thislist
;   Place a howitzer, and put this in his init field: west_arty = group this
;   Place a west soldier, and put this in his init field:
;      [this, "east_units", "west_units", west_arty] exec "ai_arty_ua.sqs"
;
;----------------------------------------------------------

_observer = _this select 0
_enemies = _this select 1
_friends = _this select 2
_arty = _this select 3

;wait for UA to initialize
~60
_Artyposture = ((leader _arty) call CoCfIFFindAsset) + "p"

#Loop
~15
;loop until enemy detected or unit is killed
? !(alive _observer) : exit
? ("Land" countType ([_observer, call _enemies, false] call knownUnits)) > 0 : goto "Next"
goto "Loop"

#Next
;go back if arty is unavailable
? (Call _ArtyPosture) > 0 : goto "Loop"
_knownEnemies = [_observer, call _enemies, true] call knownUnits
_i = 0
_max = count _knownEnemies

;loop until a target is found with no friendlies nearby
#FindTarget
     _target = _knownEnemies select _i
;    The number below (after _target) is the distance around the target that must be clear of friendlies to call the strike
;    EG: 75 means no strike can be called on that target if any friends are within 75 meters of the target.
;    This number should be increased if the arty you are using covers a larger strike area (such as MLRS)
     ?  count ([_target, 150, call _friends, false] call findUnits) == 0 AND "Land" countType [_target] == 1 : goto "CallStrike"
     _i = _i + 1
     ? _i < _max : goto "FindTarget"

;if no safe targets, wait, then go back to beginning
~60
goto "Loop"


;----------------------------------------------------------
; EDITABLE PORTION OF SCRIPT BELOW
;----------------------------------------------------------

#CallStrike

;Replace this with the text of your choosing.
;I suggest you use this function to display the actual grid coords of the strike:
; http://www.ofpec.com/editors/funcref.php?filter_func=11
_observer sidechat format ["Requesting artillery support at grid %1.", [getpos _target] call GridCoord]
_observer sidechat "Requesting artillery support!"

;The number after [getpos _target] is how many rounds each unit will fire for the strike.
;EG: Putting a '5' here will make each arty unit fire 5 rounds each time the AI calls for fire.
;Check your UA documentation for a description of the other parameters.
[_arty, [getpos _target], 3, 0, 0, 0, true] Call CoCfIFCallFire

~60
goto "Loop"
;----------------------------------------------------------
The specific error: 'scalar  |# |bool array string 0xfcffffefo': Error unknown operator bool

[h-]

The oh so informative OFP error messages... 

That can literally be anything in the script so all you can do is after each variable assignment etc. to check what it actually is

[snafu]

Thanks, I'll have a look this afternoon. 

[h-]

It can be just a typo somewhere.
BI wiki says this

[SoldierEPilot]

Hi!

At first, check out if you use array names rather then arrays, i.e.

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Enemies = (units e1) + (units e2)"Enemies" is a proper argument for GB's script, but not Enemies!

Two ways to detect undefined vars in any script

Simple:

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; place after variable assigment
hint format["%1", _var]; exit
You can also check out several vars at once:

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hint format["%1", [_var, _var2, _var3]]; exit
Safe method (never crashes OFP on big arrays):
Place this line at the start of the script

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is_nil = "private{_nil};_nil=true;(_this select 0)call{_nil=false};_nil"
; place after variable assigment

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?[_var] call is_nil: hint "undefined variable"; exit

[snafu]

The issue was that the UA artillery has to be placed first before anything else.

Thank you guys for your help.