CS2D 
How can I insert a value inside this matrix?
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function CreateBST()
BSoldier = {}
for bl = 1,32 do
BSoldier[bl] = {}
for bn = 1,2 do
BSoldier[bl][bn] = 0
end
end
end
This is what I do to create the matrix and to set the initial value of it's elements as 0.
And I did this to change the value of one element:
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source = 1 b = (string.sub(msg,12)) if player(b,'exists') then BSoldier[b][1] = source end end
The line 4 in the second code results in this error: attempt to call global 'BSoldier' (a nil value).
I used print(source), print(b) and print(BSoldier[b][1]) to make sure that all of them had any integer value before reaching line 4, and they do... What should I do in order to correctly insert the 'source' value in 'BSoldier[b][1]'?