Table has error

Hi,

On 11.2.0.4 on AIX

I ran:

select * from CSR.CSR_RULES_B where numrow < 5;

ERROR at line 1:

ORA-04063: table "CSR.CSR_RULES_B" has errors

I want to know the error:

SQL> show error

No errors.

How to find the error with that table?

Thanks and regards.