ST06 data not reflecting

Dear Experts,

WE are running on ECC 6.0 on Windows MSSQL 2005 platform kernel level 146.

Since yesterday we are not able to see any value in ST06 transaction code. ( 0 values found )

We have not done any changes in system and SAPOSCOL is running fine.

What could be the reason for the same. I have also rebooted system twice but didnt helped.

Best Regards,

AjitR