在smartforms里用types定义的内表仅能供smartforms内部使用 作为接口参数的内表必须types系统里已有的系统结构或者自己在SE11里建的结构对象
Define another type for your internal table and use it TYPES: your_tab TYPE TABLE OF str_tcp0a.
The self-defined types can only used in the forms within a smartforms. For a parameter of an interface, you have to use a globe structure which can be either a structure or a type defined in a type group. Take a look at a function group generated by a smartforms, you will see the scope for type/data definitions