A database error occured. The database error text is: ORA-29275: partial multibyte character . (WIS 10901)

Hi,

My Webi report is geeting failed with the error

"A database error occured. The database error text is: ORA-29275: partial multibyte character . (WIS 10901)"

may i know the root cause of the above error and how to resolve it. I am using BO 3.1.

Its very important to provide the report. Please help urgently.

Thanks in advance.

Abid