Functional Method - Returning parameter typing

[Former Member]

Hello experts, i´ve got a question about typing of retruning parameters.

For example, this is my class:

class ZCL_TEST definition
  public

*"* public components of class ZCL_CLASS
*"* do not include other source files here!!!
public section.
  types:
    BEGIN OF ty_letyps
                  letyp type lvs_letyp 
           END OF ty_letyp.
 types:  ty_t_letyps type standard table of ty_letyps.
 class-methods GET_LETYPS
    importing
      !I_MATNR type MATNR
      !I_LGNUM type LGNUM
    returning
      value(RT_LETYPS) type TY_T_LETYPS.

if i want to activae the class i get a syntax error:

The type of a RETURNING parameter must be fully specified

I knew that returning parameters musst be fully specified - that says to me i must not use type any or type any table or other gerneric datatypes for returning parameter. But my type ty_t_letyp is not generic and i can it also use outside the class via

DATA: it_table type ZCL_TEST definition=>ty_t_letyp.

So can someone explain why i must not use local defined types for returning parameters?

Regards

[MarcinPciak]

Try typing the table giving key fields

types:  ty_t_letyps type standard table of ty_letyps with key field1 field2....

This might be the problem.

Regards

Marcin

[Former Member]

Great it works, thank you.

[MarcinPciak]

It this was helpful some appreciation is also welcome.

Cheers

[Former Member]

done