SQL & PL/SQL

Hi all ,

we have one table Error_log which stores the Error log , one column datatype is CLOB
but when i use
select * from error_log ;

it gives me error so i use to_char function for that CLOB column in select statement
but now this gives me following error

ora-22835: buffer too small for clob to char or blob to raw conversion ( actual : 5039 , maximum : 4000)

We use toad 7.6

please help me .