XML Error

Hi Guys.

I need I litthe help on this issue.
After saved an excel file in XML when I try to open appear the below error:

XML ERROR in Workbook
An log error is created, and when I opne it in notedpad it's not clear for me were is the error and how to solve it. Can anyone help me, this is a huge importance.

I've upload a part of the log infomration, it's allways the same in the log file.

Can anyone help me to fix, or how to fix?
Best regarsd
Roberto

No one?? Really???