Table Declaration

In my FM , I need to use the Ztable 'zlog' . So , i declare the table using Tables statement . when i Syntx Check , it is fine . But when i try and activate the FM it says , the table " zlog" has been already declared..If i comment the declaration , it gives an syntax error that " table zlog not declared " .

tables: zlog,

vbuk,

lips.

select single * from zlog into zlog

where vbeln = vbeln_l.

What can be the possible cause of such error ??

Message was edited by: SAP BEE