TOPIC:

Hi,
i tried the snippet & i am getting exception, i am attaching screenshot, please see that, if required i can upload the whole project so that you can check.

I cannot reproduce your issue.
Make sure that you are not using a released object, after saving and closing the document, you should reopen it and reload the pages.

Please, if you have more questions i invite you to start a new post, as this post is becoming too long and also to be more helpful for other users.

Thanks for the information, i shall recheck & open new post if i find any further issues.