Typeerror: error #1009: cannot access a property or method of a null object reference.

Question

Problem  :

I want to develop the couple of basic games on flash that consist in random numbers but I am facing following error every time I execute my scene:

TypeError: Error #1009: Cannot access a property or method of a null object reference.

at capacitacion_fla::MainTimeline/frame1()

TypeError: Error #1009: Cannot access a property or method of a null object reference.

at capacitacion_fla::MainTimeline/frame1()

at flash.display::MovieClip/gotoAndStop()

at capacitacion_fla::MainTimeline/fl_ClickToGoToAndStopAtFrame()

I am new to flash and trying to learn flash and as3 and I will be more than happy if someone help me in finding the solution on my issue.

Answer 1

Error No 1009 wants to tell you that it is unable to find either a button, Movie Clip, Text field etc. One easy solution for your error is to make sure that your buttons have the instance names. I think that you are using CS6 or the older version of Flash. In that case please select a button, like the mynumerico_btn when you are on the particular stage. Then you  can go to the properties panel and in your instance input field put the required name of mynumerico_btn.

You must follow this for all of your buttons. Finally, you need to declare those buttons. As follows :

var mynumerico_btn:SimpleNumericButton;

That must solve the error. Just as an addition please make sure your button must be enabled by adding mynumerico_btn.enabled = true; before the event listener.