Checking out CallClient("Structure Generator", ...

Dear Friends and Gurus,

I want to understand this business with the called clients. Success with ApplyMasterPages and BookErrorLog, but no success with the Structure Generator. The following script runs without error, but where is the generated table document?

/* E:\_DDDprojects\FM-JsxLib\FMjsxLib\Functions\Demos\GenerateConversionTable.jsx 
              Test/Demo for Generate Conversion Table
History       2022-02-15
*/ ; // ========================================================================

//@target framemaker
var KLD_Z = KLD_Z || {};                          // global script object

//@include ..\Message.jsx 

KLD_Z.GenerateConversionTable = function (oDoc) { // ==========================
/*            Generate a conversion table to convert document to structed document
Arguments     oDoc            Document for which to generate the table
Return        false in case of error, else true;
Comment       See also function UpdateConversionTable
Reference     FDK Programmer's Reference "F_ApiCallClient() calls to generate a conversion table"
History       2022-02-25
*/
var docID, msg01, msg02, ret;

  docID = oDoc.id;
  msg01 = "First call to Client «Structure Generator» for document ID %01 failed with return code %02. I have no clue what this means.";
  msg02 = "Second call to Client «Structure Generator» for document ID %01 failed with return code %02. I have no clue what this means.";

  ret = CallClient("Structure Generator", "SourceDocId " + docID);
  if (ret != 0) {
    KLD_Z.Message ("E", msg01, "GenerateConversionTable", [docID, ret]);
    return false;
  }
  ret = CallClient("Structure Generator", "GenerateTable");
  if (ret != 0) {
    KLD_Z.Message ("E", msg02, "GenerateConversionTable", [docID, ret]);
    return false;
  }
  return true;
} //--- end GenerateConversionTable --------------------------------------------

KLD_Z.main = function () { // <><><><><><><><><><><><><><><><><><><><><><><><><>
var oDoc, oFlow, oTFrm, oAFrm;

  oDoc=app.ActiveDoc;
$.bp(true);
  KLD_Z.GenerateConversionTable (oDoc);
} //--- end main ---------------------------------------------------------------

KLD_Z.main ();

 Towards the end of t he script something happens with the source document (it seems that the cursor moves through the page), but no additional document is opened.

→ Any ideas?