http://www.up-00.net/do.php?img=894
why appear this popup if there is no error. i do not know why

this file help me when i insert chart after minutes turns to balnk


here when series is as picture it is correct no error before turns balnk
http://www.up-00.net/do.php?img=891

here when series is #REF as picture it is wrong get error after problem
http://www.up-00.net/do.php?img=890

Why turns to #REF? id on not know why?how i prevent (edit series)turns to #REF