How ho handle the exception

Hi experts ,

I have standard smartform DPR_APPROVAL_HIER which is related to xRPM , whenever i am excution this smartform i am getting error exception occor which is not handled .

the Exception name is CX_DPR_FATEL_ERROR . its totally relard with OOPs , i not have any idea of that ,

Please let me know if there is any one have solution , how can catch this exception.

thanks in Advance

Ajay