CS2D 
attempt to concatenate field '?'
1 
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while players shooting primary or secondary weapon, weapons will be jammed in rare case.
when weapons jammed, player's ammo will saved at temporary variables, remove player's weapon's ammo values. and then when player unjams it, temporary variable will replace empty ammo.
the error appears at line 50
1
LUA ERROR: sys/lua/jam.lua:50: attempt to concatenate field '?' (a boolean value)
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function array(g,r)
local a={}
for i=1,g do
a[i]=r
end
return a
end
jammy={}
jammy.user=array(32,0)
jammy.tempam=array(32,0)
jammy.tempamin=array(32,0)
addhook("attack","jammy.atk")
function jammy.atk(id)
wep = player(id,"weapontype")
if (wep>=1 and wep<=49) then
jamrandom=math.random(1,5)
if (jamrandom==1) then
parse("sv_sound2 "..id.." \"env/click2.wav\"")
parse("effect \"smoke\" "..player(id,"x").." "..player(id,"y").." 20 0")
parse("effect \"fire\" "..player(id,"x").." "..player(id,"y").." 1 0")
parse("explosion "..player(id,"x").." "..player(id,"y").." 15 3 0")
parse("setammo "..id.." "..wep.." 0 0")
timer(500,"parse","strip "..id.." "..wep.."")
elseif (jamrandom==2) then
jammy.user[id]=1
jammy.tempam[id]=item(id,"ammo") -- save player's weapon's ammo value at "temporary variable"
jammy.tempamin[id]=item(id,"ammoin")
parse("setammo "..id.." "..wep.." 0 0")
hudm(id)
end
end
end
function hudm(id)
parse("hudtxt2 "..id.." 5 \"\169230230230Press [E] to Unjam\" -120 84")
parse("hudtxtalphafade "..id.." 5 1 0.0")
parse("hudtxtmove "..id.." 5 500 30 84")
parse("hudtxtalphafade "..id.." 5 1000 1.0")
end
addhook("use","jammy.use")
function jammy.use(id,e)
if e==0 then
if jammy.user[id]==1 then
parse("sv_sound2 "..id.." \"env/click2.wav\"")
wep = player(id,"weapontype")
parse("setammo "..id.." "..wep.." "..jammy.tempamin[id].." "..jammy.tempam[id]) -- Error appears at this line
parse("sv_sound2 "..id.." \"Oops321/Weapon/unjammed.ogg\"")
jammy.user[id]=0
parse("hudtxtalphafade "..id.." 5 3000 0.0")
end
end
end
function jamre(id)
wep = player(id,"weapontype")
parse("setammo "..id.." "..wep.." "..jammy.tempamin[id].." "..jammy.tempam[id])
parse("sv_sound2 "..id.." \"Oops321/Weapon/unjammed.ogg\"")
jammy.user[id]=0
parse("hudtxtalphafade "..id.." 5 3000 0.0")
end
thanks for read , sorry for bad english.
_oops