EEncodingError

No mapping for the Unicode character exists in the target multi-byte code page.

executable         : heidisql.exe
exec. date/time    : 2019-02-21 21:49
version            : 10.1.0.5484

0048e13f heidisql.exe System.SysUtils          TEncoding.GetChars
0048de3e heidisql.exe System.SysUtils          TEncoding.GetChars
0048c6c9 heidisql.exe System.SysUtils          TEncoding.Convert
009cc0d1 heidisql.exe apphelpers      1362 +16 ReadTextfileChunk
00da3aee heidisql.exe Main            3574 +28 TMainForm.RunQueryFile
00da2fcc heidisql.exe Main            3508 +65 TMainForm.RunQueryFiles
00da2575 heidisql.exe Main            3415 +10 TMainForm.actLoadSQLExecute
0055ae20 heidisql.exe System.Classes           TBasicAction.Execute
006760a5 heidisql.exe Vcl.ActnList             TCustomAction.Execute
0055ab14 heidisql.exe System.Classes           TBasicActionLink.Execute
00824a07 heidisql.exe Vcl.Menus                TMenuItem.Click
008271fe heidisql.exe Vcl.Menus                TMenu.DispatchCommand
00829525 heidisql.exe Vcl.Menus                TPopupList.WndProc
00829425 heidisql.exe Vcl.Menus                TPopupList.MainWndProc
0055c293 heidisql.exe System.Classes           StdWndProc
7ffc9cd7 USER32.dll                            DispatchMessageW
0084e09e heidisql.exe Vcl.Forms                TApplication.ProcessMessage
0084e113 heidisql.exe Vcl.Forms                TApplication.HandleMessage
0084e561 heidisql.exe Vcl.Forms                TApplication.Run
00ddefca heidisql.exe heidisql          85 +26 initialization
7ffc9d4e KERNEL32.DLL                          BaseThreadInitThunk
7ffc9ddc ntdll.dll                             RtlUserThreadStart

Looks like issue #515