Short dump - reading from roll back segment

Hi All,
I am getting this short dump for few loads.The error is :
"(FUNCTION)", or declared in the procedure's RAISING clause.                        
To prevent the exception, note the following:                                       
Database error text........: "ORA-01555: snapshot too old: rollback segment         
number 108 with name "PRS_77" too small"                                           
Did any body got this eror:If so,could you please explain why it's comming and how to fix this permanently?
Thanks
Manish                                                        

The DBA probably needs to increase the size of the Rollback segment and/or tablespace.
Google the error message for more info. Here's a link to Jonathan Lewis's (well known Oracle author)site.
http://www.dba-oracle.com/t_ora_01555_snapshot_old.htm
Added the link to J Lewis site.
Message was edited by:
        Pizzaman

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