PB in RFC function declaring table as CHANGING

Hi all,
I wrote an RFC function to get data between 2 SAP systems. I've to transmit to this function select-options felds. Therefor I've created a changing parameter in the function  I_LFDAT type RSPARAMS_TT which is a table type with structure RSPARAMS.
I did it by this way as 'Tables are obsolete' in RFC functions.
My problem is that by calling the function I've a dump saying ' (ungültiger Datentyp 17)'. This means the parameter is not correct.
I checked anything and the table I'm sending has the same structure as the receiving parameter
thanks in advance for your help

Hello Fred
I am not really a fan of CHANGING parameters in fm's.
Since you have the table type RSPARAMS_TT I would recommend to use the following approach:
DATA:
  lt_seloptions   TYPE rsparams_tt.  " itab with select-options
" fm signature with 2 parameters:
  IMPORTING
    it_selopts = lt_seloptions
  EXPORTING
   et_selopts = lt_seloptions
The RFC-fm gets IT_SELOPTS as input, can change them, and returns them as EXPORTING parameter ET_SELOPTS.
Regards
  Uwe

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