Roleplay Server DMV Bug

[akram03]

                    if (randomQuestion) and (randomID) then
                        _currentQuestion = randomID
                        questions[randomID][3] = true
                        
                        local posY = 63
                        for i,v in ipairs(randomQuestion[4]) do
                            if (i ~= 1) then
                                posY = (posY or 63)+20
                            end
                            
                            guiSetText(exam.label[1], randomQuestion[1])
                            exam.radiobutton[#exam.radiobutton+1] = guiCreateRadioButton(45, posY, 405, 18, randomQuestion[4][1], false, exam.window[1])
                        end
                        
                        guiSetText(exam.window[1], "Exam (Question " .. currentQuestion .. " of " .. maxQuestions .. ")")
                    else
                        guiSetText(exam.label[1], "Error occured! Click 'Cancel Exam' to get an instant refund.")
                        guiSetEnabled(exam.button[1], false)
                    end

 

This is part of my dmv script however whenever i got to the dmv ped ingame, it lets me answer like 2-4 questions, then it will either bug and display nothing, or it will give this error "Error occured! Click 'Cancel Exam' to get an instant refund.". I dont know how to fix this ive been trying for a week now. Please may someone help. 

[Dimos7]

put the code used not onlky a part aslos    us the icon with <> and place your code there

[idarrr]

This thing here

if (randomQuestion) and (randomID) then

else
  -- if code executed here, statement above return false
end

randownQuestion or randomID value may contain nil value