problem in for all entries statement.

This is a sample program :

data : BEGIN OF itab OCCURS 0,
        aubel type vbrp-aubel,
        aupos type vbrp-aupos,
        end of itab.
       
data : BEGIN OF itab1 OCCURS 0,
        ebeln type mseg-ebeln,
        ebelp type mseg-ebelp, 
        end of itab1.
            
select vbrp~aubel
        vbrp~aupos from vbrp
        into CORRESPONDING FIELDS OF TABLE itab.
  
select ebeln
        ebelp from mseg
        into CORRESPONDING FIELDS OF TABLE itab1 FOR ALL ENTRIES IN itab1 where ebelp = itab-aupos.

it shows syntax error The WHERE condition does not refer to the FOR ALL ENTRIES table. -

it shows syntax error because technical attribute of mseg-ebelp and vbrp-aupos are different..

this error can be solved by using inner join but my requirement is to use for all entries statement.

Kindly help.

Regards,

Sandeep