Test for Object Visible

TC would look for object property "visible" when object exists.
but if by any chance it's not yet full created when you looking for property "visible",
will fire error object not exist.
so either you can use

user.WaitProperty("Visible",true,2500)

will waite for 2.5 second untill "visible" is true or continue.

or you can write your code in side another if like

if user.WaitProperty("Exists",true,2500){
........your code .......}

Also create same scenario manually and make sure object could be accessed by object spy