Murray it really strange but it works! And I don't have any Idea why... And when I use your tip new problem was born. Now when I choose right button command "paste" isn't available. Why? Ii is really strange...
Sorry for my impatiance, but now paste isn't available and it disturb me in my work. I don't really know what is the cause of these problems. Please help.
Something that will not let you copy and paste, this is one of them in the the drawing attach.
List your entities and find out what they are