AR Archive Preview Error

Hi I am trying to archive transactions in AR but got error below:

	DELETE ar_archive_header;
	*

ERROR at line 284:

ORA-06550: line 284, column 15:

PL/SQL: ORA-04063: view "AR.AR_ARCHIVE_HEADER#" has errors

ORA-06550: line 284, column 8:

PL/SQL: SQL Statement ignored

ORA-06550: line 287, column 15:

PL/SQL: ORA-04063: view "AR.AR_ARCHIVE_DETAIL#" has errors

ORA-06550: line 287, column 8:

PL/SQL: SQL Statement ignored

ORA-06550: line 324, column 15:

PL/SQL: ORA-04063: view "AR.AR_ARCHIVE_HEADER#" has errors

ORA-06550: line 322, column 8:

PL/SQL: SQL Statement ignored

Can someone tell me how will I fix this?

Thanks.