This one on opening a new xml file: 
Exception description:

Access violation at address 00000000008B5618 in module 'PSPad.exe'. Read of
address 00000000000007E8.

Exception class: EAccessViolation
Exception address: 00000000008B5618
--------------------------------------------------------------------------------
--------------------
Stack list, generated 18/04/2021 13:24:19
[00000000008B5618] SynEditKbdHandler.TMethodList.Remove (Line 394,
"SynEditKbdHandler.pas" + 5) + $B
[0000000000863B58] JclDebug.JclCreateStackList (Line 5308, "JclDebug.pas" + 1) +
$3F
[0000000000863AC6] JclDebug.DoExceptionStackTrace (Line 5249, "JclDebug.pas" +
20) + $15
[00000000008654B2] JclDebug.DoExceptNotify (Line 6276, "JclDebug.pas" + 7) + $0
[0000000000853955] JclHookExcept.TNotifierItem.DoNotify (Line 272,
"JclHookExcept.pas" + 5) + $11
[0000000000853B9B] JclHookExcept.DoExceptNotify (Line 339, "JclHookExcept.pas" +
13) + $2B
[0000000000853D57] JclHookExcept.HookedExceptObjProc (Line 395,
"JclHookExcept.pas" + 5) + $0
[000000000041139E] System.@DelphiExceptionHandler + $26E
[00007FFA7179207F] Unknown function at __chkstk + $11F
[00007FFA71741454] RtlRaiseException + $434
[00007FFA71790BAE] KiUserExceptionDispatcher + $2E
[00000000008B5618] SynEditKbdHandler.TMethodList.Remove (Line 394,
"SynEditKbdHandler.pas" + 5) + $B
[00000000008B53F2] SynEditKbdHandler.TSynEditKbdHandler.RemoveMouseDownHandler
(Line 344, "SynEditKbdHandler.pas" + 2) + $0
[00000000008DC795] SynEdit.TCustomSynEdit.RemoveMouseDownHandler (Line 10963,
"SynEdit.pas" + 2) + $0
[0000000000B56750] SynAutoCorrect.TCustomSynAutoCorrect.SetEditor (Line 746,
"SynAutoCorrect.pas" + 6) + $0
[0000000000C677F5] uChildEdit.TfChildEdit.SynEditEnter (Line 2304,
"uChildEdit.pas" + 5) + $0
[00000000008042A2] Vcl.Controls.TWinControl.DoEnter + $22
[00000000008054C6] Vcl.Controls.TWinControl.CMEnter + $56
[000000000040FEF5] System.TObject.Dispatch + $45
[00000000007FAC40] Vcl.Controls.TControl.WndProc + $370
[0000000000801EA0] Vcl.Controls.TWinControl.WndProc + $9A0
[00000000008CEA3B] SynEdit.TCustomSynEdit.WndProc (Line 6372, "SynEdit.pas" +
23) + $0
[000000000080101C] Vcl.Controls.TWinControl.MainWndProc + $2C
[00000000005561B6] System.Classes.StdWndProc + $26
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147DE1B] Unknown function at SendMessageW + $86B
[00007FFA7147D68A] SendMessageW + $DA
[00000000007A2829] Vcl.Forms.SendFocusMessage + $19
[00000000007AB679] Vcl.Forms.TCustomForm.SetFocusedControl + $339
[00000000008018B9] Vcl.Controls.TWinControl.WndProc + $3B9
[00000000008CEA3B] SynEdit.TCustomSynEdit.WndProc (Line 6372, "SynEdit.pas" +
23) + $0
[000000000080101C] Vcl.Controls.TWinControl.MainWndProc + $2C
[00000000005561B6] System.Classes.StdWndProc + $26
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147E3DC] Unknown function at DispatchMessageW + $39C
[00007FFA71490BC3] Unknown function at SendMessageTimeoutW + $143
[00007FFA71790B54] KiUserCallbackDispatcher + $24
[00007FFA6F621A64] NtUserSetFocus + $14
[00000000007AB8A5] Vcl.Forms.TCustomForm.SetWindowFocus + $65
[00000000007AB1A7] Vcl.Forms.TCustomForm.SetActiveControl + $F7
[00000000007AB9F5] Vcl.Forms.TCustomForm.SetActive + $85
[00000000007AD08D] Vcl.Forms.TCustomForm.WMMDIActivate + $3D
[000000000040FEF5] System.TObject.Dispatch + $45
[00000000007FAC40] Vcl.Controls.TControl.WndProc + $370
[0000000000801EA0] Vcl.Controls.TWinControl.WndProc + $9A0
[00000000007A7C4E] Vcl.Forms.TCustomForm.WndProc + $99E
[000000000080101C] Vcl.Controls.TWinControl.MainWndProc + $2C
[00000000005561B6] System.Classes.StdWndProc + $26
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147DE1B] Unknown function at SendMessageW + $86B
[00007FFA7147D68A] SendMessageW + $DA
[00007FFA7149EDFD] Unknown function at DefMDIChildProcW + $DDD
[00007FFA7149E177] Unknown function at DefMDIChildProcW + $157
[00007FFA7149E02E] DefMDIChildProcW + $E
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147E4EE] CallWindowProcW + $8E
[0000000000802037] Vcl.Controls.TWinControl.DefaultHandler + $117
[00000000007AB0A3] Vcl.Forms.TCustomForm.DefaultHandler + $73
[000000000040FF03] System.TObject.Dispatch + $53
[00000000007FAC40] Vcl.Controls.TControl.WndProc + $370
[0000000000801EA0] Vcl.Controls.TWinControl.WndProc + $9A0
[00000000007A7C4E] Vcl.Forms.TCustomForm.WndProc + $99E
[000000000080101C] Vcl.Controls.TWinControl.MainWndProc + $2C
[00000000005561B6] System.Classes.StdWndProc + $26
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147E3DC] Unknown function at DispatchMessageW + $39C
[00007FFA71490BC3] Unknown function at SendMessageTimeoutW + $143
[00007FFA71790B54] KiUserCallbackDispatcher + $24
[00007FFA6F621B24] NtUserShowWindow + $14
[00007FFA7149E8B3] Unknown function at DefMDIChildProcW + $893
[00007FFA7149E3A6] Unknown function at DefMDIChildProcW + $386
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147E4EE] CallWindowProcW + $8E
[00000000007A7DD2] Vcl.Forms.Default + $52
[00000000007A80B9] Vcl.Forms.TCustomForm.ClientWndProc + $269
[00000000005561B6] System.Classes.StdWndProc + $26
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147DE1B] Unknown function at SendMessageW + $86B
[00007FFA7147D68A] SendMessageW + $DA
[00000000007AE3F2] Vcl.Forms.TCustomForm.CMShowingChanged + $7F2
[000000000040FEF5] System.TObject.Dispatch + $45
[00000000007FAC40] Vcl.Controls.TControl.WndProc + $370
[0000000000801EA0] Vcl.Controls.TWinControl.WndProc + $9A0
[00000000007A7C4E] Vcl.Forms.TCustomForm.WndProc + $99E
[00000000007FA732] Vcl.Controls.TControl.Perform + $32
[0000000000800D1F] Vcl.Controls.TWinControl.UpdateShowing + $15F
[0000000000800E5E] Vcl.Controls.TWinControl.UpdateControlState + $CE
[0000000000805604] Vcl.Controls.TWinControl.CMVisibleChanged + $44
[000000000040FEF5] System.TObject.Dispatch + $45
[00000000007FAC40] Vcl.Controls.TControl.WndProc + $370
[0000000000801EA0] Vcl.Controls.TWinControl.WndProc + $9A0
[00000000007A7C4E] Vcl.Forms.TCustomForm.WndProc + $99E
[00000000007FA732] Vcl.Controls.TControl.Perform + $32
[00000000007F8685] Vcl.Controls.TControl.SetVisible + $45
[00000000007A705D] Vcl.Forms.TCustomForm.SetVisible + $5D
[00000000007A5CB7] Vcl.Forms.TCustomForm.DoCreate + $77
[00000000007A562E] Vcl.Forms.TCustomForm.AfterConstruction + $1E
[00000000004101D0] System.@AfterConstruction + $20
[00000000007A54CB] Vcl.Forms.TCustomForm.Create + $22B
[0000000000D41D5A] uMain.TfPSPad.CreateChild (Line 2646, "uMain.pas" + 7) + $15
[0000000000D4A3CC] uMain.TfPSPad.OpenSynEditFile (Line 4308, "uMain.pas" + 31) +
$0
[0000000000D5F805] uMain.TfPSPad.OpenFileByParams (Line 9441, "uMain.pas" + 171)
+ $0
[0000000000D6005A] uMain.TfPSPad.WMGetCommand (Line 9540, "uMain.pas" + 29) +
$D
[000000000040FEF5] System.TObject.Dispatch + $45
[00000000007FAC40] Vcl.Controls.TControl.WndProc + $370
[0000000000801EA0] Vcl.Controls.TWinControl.WndProc + $9A0
[00000000007A7C4E] Vcl.Forms.TCustomForm.WndProc + $99E
[000000000080101C] Vcl.Controls.TWinControl.MainWndProc + $2C
[00000000005561B6] System.Classes.StdWndProc + $26
[00007FFA7147E858] Unknown function at CallWindowProcW + $3F8
[00007FFA7147E3DC] Unknown function at DispatchMessageW + $39C
[00007FFA71492760] Unknown function at InitDManipHook + $4B0
[00007FFA71790B54] KiUserCallbackDispatcher + $24
[00007FFA6F621064] NtUserPeekMessage + $14
[00007FFA7147A5C3] Unknown function at PeekMessageW + $1E3
[00007FFA7147A523] PeekMessageW + $143
[00000000007B62B0] Vcl.Forms.TApplication.ProcessMessage + $30
[00000000007B6428] Vcl.Forms.TApplication.HandleMessage + $18
[00000000007B6876] Vcl.Forms.TApplication.Run + $E6
[0000000000D8E3BC] PSPad.PSPad (Line 121, "" + 56) + $0
[00007FFA6F767034] BaseThreadInitThunk + $14
[00007FFA71742651] RtlUserThreadStart + $21
--------------------------------------------------------------------------------
--------------------
Program  : C:\Program Files\PSPad editor\PSPad.exe  5.0.6 (589)
System   : Windows 10 Professional x64, Version: 10.0, Build: 4A62, 
Processor: Intel, Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz, 3700 MHz MMX
Display  : 2560x1440 pixels, 32 bpp PPI: 96
Skin     : Windows
--------------------------------------------------------------------------------
--------------------
Active Controls Hierarchy:
TPSSynEdit "FEditor1"
TfChildEdit "fChildEdit"
--------------------------------------------------------------------------------
--------------------

-- 
<https://forum.pspad.com/read.php?4,75329,75340>
PSPad freeware editor https://www.pspad.com

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