Oracle Stored Procedure error

Can anyone tell me what is wrong with the following code block in Oracle?

set serveroutput on;
DECLARE
strAccess VARCHAR2(100);
cursor curAccess(v_Physical_instance_uid NUMBER)
IS  
select mtyp.code
from physical_instance_headers pih, material_set mset, content c, content_parts cp,
materials m, material_types mtyp, material_status mst
where mset.object_uid= pih.physical_instance_uid
and pih.physical_instance_uid = v_Physical_instance_uid
and mset.object_uid_type=pih.uid_type
and c.material_set_uid=mset.material_set_uid
and cp.content_uid=c.content_uid
and cp.material_uid=m.material_uid
and m.material_type_uid=mtyp.material_type_uid
and m.material_status_uid=mst.material_status_uid
and mst.code='TXR';
curAccessRow curAccess%rowtype;
BEGIN
    OPEN cAccess(294927);      
        LOOP
        EXIT WHEN curAccess%notfound;
            FETCH curAccess into curAccessRow;            
            SELECT curAccessRow.code
                 CASE
                 WHEN 'CLCA' THEN strAccess := strAccess || 'S, '
                 WHEN 'AUDD' THEN strAccess := strAccess || 'D, '
                 WHEN 'SIGN' THEN strAccess := strAccess || 'SL, '
                 WHEN 'AD'   THEN strAccess := strAccess || 'AD, '
                 WHEN 'VDWS' THEN strAccess := strAccess || 'W, '                  
                 ELSE strAccess := strAccess
             END  
             dbms_output.put_line(strAccess);        
        END LOOP;
        CLOSE cAccess;
        strAccess := '[' || substr (strAccess, 1, length(strAccess)-2) || ']';
    DBms_output.put_line(strAccess);
END

I am getting the following errors:

10:31:43  ORA-06550: line 25, column 18:
10:31:43  PL/SQL: ORA-00923: FROM keyword not found where expected
10:31:43  ORA-06550: line 23, column 13:
10:31:43  PL/SQL: SQL Statement ignored
10:31:43  ORA-06550: line 38, column 24:
10:31:43  PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following:
10:31:43  
10:31:43     ; <an identifier> <a double-quoted delimited-identifier>
10:31:43  The symbol ";" was substituted for "end-of-file" to continue