As I could find out if a record of date has void value or no.
I try, but give error:

select alminv.fecha, alminv.fconteo from alminv where ((alminv.entidad = :vch_entidad) and (alminv.almacen = :sin_almman) and (alminv.codigo = :vch_cod)) into :dat_fec, :dat_fcont;
if (row_count > 0) then
begin
if ((dat_fec not is null) and (dat_fcont not is null)) then /* Here give the error */

Thanks
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|| ISMAEL ||
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