Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 500

HI,

I am getting the below error when i try to update the text <d907> to the database.

Error: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 500

Text Enterted : <d907>

Any one please help me out to resolve the this issue

Many Thanks in advance.