Looks like he's not declaring the var's 1st leading to the nil returns. Moving the call for the basecalc below the vars like below should resolve the issue. 




------------Wallet Adrresses-------------------------
wBTC  = "set BTC address here"
wLTC  = "set LTC address here"
wETH  = "set ETH address here"
wDOGE = "set DOGE address here"
wBCH  = "set BCH address here"

wCUR = wDOGE   -- >>>Select Betting Currency<<<
-------------------------------------------------------

function sleep(n)
	t0 =  os.clock()
	while  os.clock() - t0 <= n do end
end



--- >>>>>>>>Changeable Values<<<<<<<<<<<<<
--- Change below values as needed, or keep as is ;)
w = 6           -- balance devider for wallet
lc = 501		-- number of losses to max out wallet -- >>>see basecalc<<<
m = 1.011		-- multiplier
ch1 = 0.99
ch2 = 0.99
chance = ch1
wsave = 1.5		-- wallet sise compared to walletOriginal to trigger wallet increase
				-- "wsave = 2" would mean wallet resets to new "balance/w" everytime wallet doubles
-----------------------------------------------------------------

-- >>fully fuctional wallet based on balance divided by "w" value set above<<
walletOriginal = balance/w   -- base wallet value to facilitate wallet increases
wallet = walletOriginal
printWallet = 0
walletIncreases = 0		-- times wallet has been increased to new "balance/w"
walletProgress = (wallet / (walletOriginal*wsave))*100
-------------------------------------------------------------------------------

-- >>>>>>>>>>>>BASECALC<<<<<<<<<<<<<<<<<
-- Basebet calculated with a geometric sequence formula
-- used your multiplier(m), max losecount(lc) and wallet
-- for base of formula.
-- So basebet or basecalc will always max out initial wallet after
-- chosen number of losses("lc" value below) on set multiplier("m" value below)

basecalc = balance/(((1 - math.pow(m,lc))/(1-m))*w)

base = basecalc
nextbet = base
betcount = 0
wincount = 0
losecount = 0
stoponwin=false
enablezz=true			-- set to false to use random high\low
sleep = 0				-- change to 1 to sleep for x seconds and reset script
						-- instead of stopping script when wallet bust

--set withdraw targets
withdrawamount = 4500   -- amount to withdraw
withdrawtarget = 10000	-- balance size to trigger withdrawal

function dobet()

if (printWallet > 7)
then
	printWallet = 0
	print("")
	print("Wallet Progress: "..string.format("%.2f",walletProgress))
	print("")
	print("Wallet = "..string.format("%.8f",wallet))
	print("")
	print("walletOriginal = "..string.format("%.8f",walletOriginal))
	print("")
	print("Wallet Level = "..walletIncreases)
	print("")
	if losecount >= 0 then print("Losecount: "..losecount) end
	print("")
else
	printWallet = printWallet + 1
end

-- Calculates new wallet value "balance/w"
if(wallet >= (walletOriginal * wsave))
then
	if(stoponwin) then stop() end
	walletOriginal = balance/w
	wallet = walletOriginal
	walletIncreases = walletIncreases + 1
	print("")
	print("Savings increased")
	resetstats();
	print("")
end

-- stop or reset script when wallet bust
if (wallet - nextbet) <=  0 then
	if sleep == 1 then
		print("")
		print(wallet)
		print("")
		print("Balance TO LOW!!!")
		print("")
		print("sleeping")
		print("")
		sleep(15)	--seconds to sleep can change to more or less
		walletOriginal = balance/w
		wallet = walletOriginal
		wincount = 0
		losecount = 0
		nextbet = base
		chance = ch1
		stoponwin = false
		walletIncreases = walletIncreases - 1
	else
		stop()
		print("")
		print(wallet)
		print("")
		print("Balance TO LOW!!!")
		print("")
		resetstats();
	end
end

--------------------Randomizer---------------------------------
r=math.random(1,2)
if (!enablezz) then
if r == 1 then
	bethigh = !bethigh
end
end

-- Unquote below for random reset seed, crashes on Primedice and Stake
--
--	s=math.random(111)
--	if s == 1 then
--	resetseed();
--	end

-----------------------------------------------------------------

if (win) then
	basecalc =  balance/(((1 - math.pow(m,lc))/(1-m))*w)  -- calculate new basebet after every win
	base = basecalc  									  -- calculate new basebet after every win
	wallet = wallet + currentprofit
	if(stoponwin) then stop() end
	wincount = wincount + 1
	losecount = 0
	nextbet = base
	chance = ch1
else
	wallet = wallet - previousbet
	losecount = losecount + 1
	wincount = 0
	nextbet = previousbet*m
	ccount = ccount + 1
end

-- Random High\Low after x losses --
if losecount >= 401 then
	bethigh = !bethigh
end

if losecount >= lc then
 	nextbet = 0
end

if nextbet >= wallet then
--	chance = ch2
	nextbet = wallet
end

if balance >= withdrawtarget then
--uncomment this line if you are sure the correct address is set.
	--withdraw(withdrawamount,wCUR)
	print(" ")
	print("CONTINUING TO WIN MORE!!!")
	print(" ")
end

end