win 10 64位，RAD Studio 10.2, 装了很多插件 remobject intraweb DEV Unidac等等。cnpack 1.1.9.991。问题表现：<br />
在form上放一个panel 上面在放一个edit button，不定时的，在拖动控件的过程中，突然就弹一个 error 的窗口，点击OK 2次后，会关闭，但只要鼠标碰到form，就弹这个错误框。点击details后<br />
[500959F5]{rtl250.bpl??} System.SysUtils.StrDispose (Line 12564, "System.SysUtils.pas" + 3) + $2<br />
[5005A42E]{rtl250.bpl??} System.ErrorAt (Line 5678, "System.pas" + 3) + $4<br />
[5005A472]{rtl250.bpl??} System.Error (Line 5689, "System.pas" + 1) + $7<br />
[500959F5]{rtl250.bpl??} System.SysUtils.StrDispose (Line 12564, "System.SysUtils.pas" + 3) + $2<br />
[50AE1F6C]{vcl250.bpl??} Vcl.Controls.TControl.Destroy (Line 5434, "Vcl.Controls.pas" + 19) + $6<br />
[5015CAF0]{rtl250.bpl??} System.Classes.RemoveFixups (Line 9715, "System.Classes.pas" + 14) + $10<br />
[50AE6AB7]{vcl250.bpl??} Vcl.Controls.TWinControl.Destroy (Line 8526, "Vcl.Controls.pas" + 45) + $9<br />
[50AEFC2C]{vcl250.bpl??} Vcl.Controls.TCustomControl.Destroy (Line 14134, "Vcl.Controls.pas" + 2) + $6<br />
[5005F8A8]{rtl250.bpl??} System.TObject.Free (Line 16994, "System.pas" + 1) + $4<br />
[525E2CE6]{vcldesigner250.bpl} VCLSurface.TVclDesignSurface.CancelDragHint (Line 4474, "VCLSurface.pas" + 9) + $0<br />
[525E269D]{vcldesigner250.bpl} VCLSurface.TVclDesignSurface.DragHintMouseMessage (Line 4322, "VCLSurface.pas" + 7) + $2<br />
[525E0976]{vcldesigner250.bpl} VCLSurface.TVclDesignSurface.IsDesignMsg (Line 3526, "VCLSurface.pas" + 56) + $14<br />
[0B6ADB5C]{IDEFixPack.dll} VCLDesignerGuideLinesHideFix.IsDesignMsg (Line 76, "VCLDesignerGuideLinesHideFix.pas" + 25) + $6<br />
[50AE49E3]{vcl250.bpl??} Vcl.Controls.TControl.WndProc (Line 7251, "Vcl.Controls.pas" + 4) + $21<br />
[50AE9843]{vcl250.bpl??} Vcl.Controls.TWinControl.WndProc (Line 10209, "Vcl.Controls.pas" + 166) + $6<br />
[50C28469]{vcl250.bpl??} Vcl.Forms.TCustomForm.WndProc (Line 4572, "Vcl.Forms.pas" + 209) + $5<br />
[50179BBE]{rtl250.bpl??} System.Classes.{System.Generics.Collections}TList&lt;System.Classes.TComponent&gt;.ItemValue (Line 4294, "System.Generics.Collections.pas" + 0) + $2<br />
[50AE9051]{vcl250.bpl??} Vcl.Controls.TWinControl.IsControlMouseMsg (Line 9972, "Vcl.Controls.pas" + 9) + $2A<br />
[50AE9843]{vcl250.bpl??} Vcl.Controls.TWinControl.WndProc (Line 10209, "Vcl.Controls.pas" + 166) + $6<br />
[50C28469]{vcl250.bpl??} Vcl.Forms.TCustomForm.WndProc (Line 4572, "Vcl.Forms.pas" + 209) + $5<br />
[525E9C1F]{vcldesigner250.bpl} VCLFormContainer.TControlSizer.ControlWndProc (Line 345, "VCLFormContainer.pas" + 33) + $C<br />
[50AE8E10]{vcl250.bpl??} Vcl.Controls.TWinControl.MainWndProc (Line 9908, "Vcl.Controls.pas" + 3) + $6<br />
[5016EBCC]{rtl250.bpl??} System.Classes.StdWndProc (Line 17408, "System.Classes.pas" + 11) + $2<br />
[50063E0C]{rtl250.bpl??} System.@FinalizeRecord (Line 31861, "System.pas" + 25) + $0<br />
[50063F30]{rtl250.bpl??} System.@FinalizeArray (Line 32142, "System.pas" + 127) + $0<br />
[50063F40]{rtl250.bpl??} System.@FinalizeArray (Line 32154, "System.pas" + 139) + $0<br />
[50063E0C]{rtl250.bpl??} System.@FinalizeRecord (Line 31861, "System.pas" + 25) + $0<br />
[50C31E1F]{vcl250.bpl??} Vcl.Forms.TApplication.ProcessMessage (Line 10641, "Vcl.Forms.pas" + 23) + $1<br />
[50C31E62]{vcl250.bpl??} Vcl.Forms.TApplication.HandleMessage (Line 10671, "Vcl.Forms.pas" + 1) + $4<br />
[50C32195]{vcl250.bpl??} Vcl.Forms.TApplication.Run (Line 10809, "Vcl.Forms.pas" + 26) + $3<br />
[0050BAB2]{bds.exe? ???} bds.bds (Line 214, "" + 7) + $7<br />
关闭Delphi后，有一个错误 Application Error
  Exception EAccess Violation in module vcl250.bpl at 0000EADD . Access violation at address 50ABEADD in module 'VCL250.bpl'. Read of address 000000000
也不知道这个问题是谁引起的，郁闷<br />
请指教，谢谢

[ 本帖最后由 sxbug 于 2020-3-17 17:15 编辑 ]