Created attachment 103513 [details]
this is the file I do not succeed in opening

Problem description: 
It is the second time I try to build up this file. But once I open it after having saved it, It does not open and I recieve the following Error Message:

Read-Error.
Format error discovered in the file in sub-document content.xml at 2,17627(row,col).

PS: I suppose it is a quiet unusual file ... I am studying sanskrit and this file should help me in execising.
It is full of sanskrit symbols (using the Sanskrit 2003 font) and formulas for combining roots and declensions.
The file is not that big, but I suppose that the problem is there.

In reality, it is the second time I try to create this file. And it is the second time that after a couple of days I obtain this reaction from it.
Can you help me?

Steps to reproduce:
1. open file
2. recieve Error Massage
3. click ok ... well, the file would never open ...
If it opens do any change and then probably, after 4-5 changes, it will not open again.

Current behavior:
It never opens again

Expected behavior:
I would like the file to open.


PS: sorry for my english, I am Italian. So many thanks, anyway!
            
Operating System: Windows 7
Version: 4.2.5.2 release