Error: invalid value, expected object?

Hello all,

I am trying to make an app in which the user clicks a button and a question is given to the user in the form of a label.

var win1 = Titanium.UI.createWindow({
    backgroundColor : 'White'
});
 
var questionPresent = 0;
// variable that determines whether the question is already present on the screen. 1 means present, 0 means not present
 
var openButton = Titanium.UI.createButton({//button used to open question
    width : 'auto',
    height : 'auto',
    top : 100,
    left : 0,
    title : 'open the test label!'
});
 
openButton.addEventListener('click', function(e) {
 
    if (questionPresent == 0) {//if no question is present, create the question label
        var question = Titanium.UI.createLabel({
            top : 300,
            left : 150,
            width : 'auto',
            height : 'auto',
            text : 'Question is here.'
        });
        win1.add(question);
        //adds the question to the view
        questionPresent = questionPresent = 1;
        //updates the "questionPresent" value, meaning question is now present.
    } else if (questionPresent == 1) {//if question is present, remove it. this is where the error occurs
        win1.remove(question)
    }
 
});
 
win1.add(openButton);
win1.open();
});

The problem is that when I try to remove the label from the window, it gives me an error: "Invalid value, expected type object." Please help! What am I doing wrong?

your "var question = Titanium.UI.createLabel({}) will overwrite on the second time clicked because you declared it in button click.

you can try this.

var question = Titanium.UI.createLabel({
            top : 300,
            left : 150,
            width : 'auto',
height : 'auto',
text : 'Question is here.'
});
 
win1.add(question);
 
openButton.addEventListener('click', function(e) {
 
 
 
    Ti.API.info("questionPresent " +questionPresent);
 
    if (questionPresent == 0) {//if no question is present, create the question label
 
        question.show();
        //adds the question to the view
        questionPresent = questionPresent = 1;
        //updates the "questionPresent" value, meaning question is now present.
    } else if (questionPresent == 1) {//if question is present, remove it. this is where the error occurs
        question.hide();
    }
 
 
 
});