Create Parameter in Smartforms Interface table tab signed as local type

Question

Error Message:
Form Interface     Only table types may be used as the reference type for a table parameter
What I did:
I have created a table in <i>tables tab</i> of <b>Form Interface</b> like this:
Parameter Name: IT_1
Type Assignemnt: TYPE
Associate Type: TYT
**TYT is defined in <i>Types</i> tab under <b>Global Definition</b> like this:
TYPES: BEGIN OF tys,
vbeln LIKE vbap-vbeln,
posnr LIKE vbap-vbeln,
END OF tys.
TYPES: tyt TYPE TABLE OF tys.
I understand that if I create these two structure in data dictionary then It will work.
But my question is :
Can I create tables parameter with locally declared type. If no, I will appreciate if you can explain the reason

Answer 1

Hi
Yes u can create a local type and use it to define IMPORT/EXPORT parameters, but you can't use a table type to be used for TABLE parameters.
Anyway I think it would be better to use the local types only to define local variable.
But the interface of SM is the gate to link the smartform to external enviroment so I believe it doesn't make a sense to create a parameter as local type because only sf can use that type and so it should re-define it in every program where the sf has to be used.
Max