I’m running some Julia code and the error message I get is as the following:
UndefRefError: access to undefined reference in top-level scope at base/None in simulate! at do_sim.jl:10 #simulate!#46 at so_sim.jl:38 simulateNextEvent! at do_sim.jl:84 simulateEvent! at do_sim.jl:184 findAmbToCallReturnRouteDistTime! at decisions.jl:117 get property at base/sysing.jl:18
Yet, I have checked the code several times and it should be good. Any comments about where and how to fix the error here?