Objects in Add action but not in Objects window

Hi all,

I have googled "object in add action but not in objects windows site:scirra.com" but there is no promising. Here is my issue.

I have several objects appear in the Add Action window but they are not visible in Objects window. I can still assign actions for those object, but I do not see them in any layer

I have also received the error: No default instance when creating objects.

How can I delete these object?

Thank you

Oh I've got it, I have to delete it in the Project window.

Please help me delete this topic.

Thank you