The debugger handles scope slightly wrong when you execute julia code in it, so if you defined obj_path_tmp in a more inner scope it is possible the debugger is showing it still being defined while it is not. Here is a MWE:
1|debug> st
In f() at REPL[11]:1
1 function f()
2 for i in 1:5
3 a = 3
4 end
>5 print(a)
6 end
About to run: (print)(Main.a)
1|julia> a
3
1|debug> n
ERROR: UndefVarError: a not defined
One of the solutions is to put local obj_path_tmp in the same scope as you want to use it:
julia> function f()
local a
for i in 1:5
a = 3
end
print(a)
end
f (generic function with 1 method)
julia> f()
3