A question about my code

is that right?
but Error when entering data
it shows
Obj([10 1 -1;2 6 1],[10 1 -1;2 6 1],20,[-2; -11])
ERROR: UndefVarError: X not defined
[1] macro expansion at C:\Users\dell.juliapro\JuliaPro_v1.3.1-2\packages\JuMP\MsUSY\src\macros.jl:189 [inlined]
[2] Obj(::Array{Int64,2}, ::Array{Int64,2}, ::Int64, ::Array{Int64,1}) at D:\Julia\Julia-1.2.0\Obj.jl:7
[3] top-level scope at none:0
thank you!

You are more likely to get help if you post the code in a way that other users can copy and paste into their own terminal.

using JuMP
using SCIP
function Obj(SC,SB,B,C)
text = Model( with_optimizer(SCIP.Optimizer))

ok,i will,thanks

I think this should be (untested):

@variable(text, 0 <= X[1:2] <= 100, Int)

Also, in your constraint, you should probably use .<= since you have a vector on the left-hand side, right?