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Hello!

I created an empty configuration and for command "import" I just took the code from another old application, and it does not work:

Code

Mode = FileDialogMode.Open;
   OpeningFileDialogue = New FileDialog(Mode);
   OpeningFileDialogue.FullFileName = "";
   Filter = "Excel(*.xlsx)|*.xlsx|Excel 97(*.xls)|*.xls";
   OpeningFileDialogue.Filter = Filter;
   OpeningFileDialogue.Multiselect = False;
   OpeningFileDialogue.Title = "Select file";
   If OpeningFileDialogue.Choose() Then
       FilesArray = OpeningFileDialogue.SelectedFiles;
       For Each FileName In FilesArray Do
           Selection = New File(FileName);
           //Message(FileName+"; Size = "+Selection.Size());
      EndDo;
      ImportAtServer(Selection.FullName);
      //UpdatePriceList();
   Else
       DoMessageBox("File(s) not selected!");
   EndIf;   
EndProcedure

In the line OpeningFileDialogue.Choose() I get an error:

{Catalog.CustomersSite.Form.ListForm.Form(16)}: Error calling context method (Choose)
If OpeningFileDialogue.Choose() Then
because:
Cannot call synchronous methods on the client!

What's wrong?

Thank you for every advice!