Defining attribute for internal table within class builder?

Hello there,
I use an function module that provides me an internal table which has the reference type of the DDIC object zml_output. Furthermore I call this function module within a global class that should keep the result of the function module into the attribute lt_result, that is declared as private and typed with
lt_result TYPE zml_output.
Even the definition of that attribute causes the following error message:
"lt_result" is not an internal table.
I don't have any clue how to type lt_result differently. Actually I would need the following type of typing "TYPE TABLE OF" but that does not exist within the class builder.
Thanks for your help in advanced!
Robert

Hi Konstantinidis ...
Of course I can provide it to you. The code of my methode load_data reads as follows:
method LOAD_DATA.
    CALL FUNCTION 'ZDATAGET'
    EXPORTING
      iv_dat    = iv_dat
      iv_time1 = iv_time1
      iv_delta = iv_delta
    TABLES
      et_result = lt_result.
endmethod.
Especially the lt_result causes the mentioned error message
The compiler seems to expect something "TABLE" like for attribute lt_result. But whatever I tried it doesn't seem to work out.
Many thanks for help...

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Defining attribute for internal table within class builder?

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