I have a message error in excel while reopen the file with details :

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
- <recoveryLog xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
<logFileName>error037640_01.xml</logFileName>

<summary>Errors were detected in file 'C:\Users\Truscel\Documents\Projects\PLN\MODEL\Bei ng Modified\New-4Feb09\Book1.xlsx'</summary>

- <repairedRecords summary="Following is a list of repairs:">
<repairedRecord>Repaired Records: View from /xl/workbook.xml part (Workbook)</repairedRecord>

</repairedRecords>


</recoveryLog>

the above error cause cells to record the last number display before saving and exit and when the file reopen the cells has lost its formula by showing #NA! .

Please anyone can help me.. I'm really need help