Dear Mesut,
in 1C extensions, the input mechanism based on (when a new document is filled with data from another, previously entered document) is implemented differently, not like in the main program.
First, you need to create a new general command in the extension (please see screen 1).
To process this command, create the following code:
| Code | 
|---|
| &AtClient
Procedure CommandProcessing(CommandParameter, CommandExecuteParameters)
   // Insert handler content.
   refSepetleme   = New Structure("Ref", CommandParameter);
   FormParameters    = New Structure("FillingValues", refSepetleme);
   
   OpenForm("Document.AsidikYağ_Alma.ObjectForm", FormParameters, CommandExecuteParameters.Source, CommandExecuteParameters.Uniqueness, CommandExecuteParameters.Window, CommandExecuteParameters.URL);
EndProcedure | 
and in the document module "AsidikYağ_Alma" - this is the filling procedure:
| Code | 
|---|
| Procedure Filling(FillingData, StandardProcessing)
   
   If TypeOf(FillingData) = Type("Structure")
      AND FillingData.Property("Ref")Then
   
      If TypeOf(FillingData.Ref) = Type("DocumentRef.Sepetleme") Then
         
         docSepetlemeRef = FillingData.Ref;
         
         SepetlemeReferans = docSepetlemeRef;
         
         SepetSıraNo = docSepetlemeRef.SepetSıraNo;
         For Each CurRowMalzemeBilgi In docSepetlemeRef.MalzemeBilgi Do
            
            NewRow = MalzemeBilgi.Add();
            NewRow.BoyaCinsi = CurRowMalzemeBilgi.BoyaCinsi;
            NewRow.BoyaFirması = CurRowMalzemeBilgi.BoyaFirması;
            NewRow.FirmaAdı = CurRowMalzemeBilgi.FirmaAdı;
            NewRow.GirişTarihi = CurRowMalzemeBilgi.GirişTarihi;
            NewRow.Kg = CurRowMalzemeBilgi.Kg;
            NewRow.MalzemeAdedi = CurRowMalzemeBilgi.MalzemeAdedi;
            NewRow.MalzemeBoyu = CurRowMalzemeBilgi.MalzemeBoyu;
            NewRow.MalzemeÇevresi = CurRowMalzemeBilgi.MalzemeÇevresi;
            NewRow.MalzemeNo = CurRowMalzemeBilgi.MalzemeNo;
            NewRow.RalKodu = CurRowMalzemeBilgi.RalKodu;
            NewRow.Yüzey = CurRowMalzemeBilgi.Yüzey;
            
         EndDo;
         
      EndIf;
      
   EndIf;
   //}}__CREATE_BASED_ON_WIZARD
EndProcedure | 
after these changes everything works (screenshots 2 and 3).
Best,
Aleksandr