TMS WebCore, New App, drop TWebtabSheet on empty form results in:
[3747F261]{TMSWEBCorePkgLibDXE14.bpl} WEBLib.ComCtrls.TWebTabSheet.GetPageIndex (Line 775, "WEBLib.ComCtrls.pas" + 1) + $9
[5005A5C2]{rtl280.bpl } System.ErrorAt (Line 5882, "System.pas" + 3) + $4
[50060167]{rtl280.bpl } System.@AsClass (Line 18501, "System.pas" + 3) + $5
[3747F261]{TMSWEBCorePkgLibDXE14.bpl} WEBLib.ComCtrls.TWebTabSheet.GetPageIndex (Line 775, "WEBLib.ComCtrls.pas" + 1) + $9
[500C5031]{rtl280.bpl } System.TypInfo.GetOrdProp (Line 2439, "System.TypInfo.pas" + 27) + $0
[20F3DBF7]{designide280.bpl} DesignEditors.TPropertyEditor.GetOrdValueAt (Line 731, "DesignEditors.pas" + 0) + $B
[20F3DBE6]{designide280.bpl} DesignEditors.TPropertyEditor.GetOrdValue (Line 726, "DesignEditors.pas" + 0) + $2
[20F3EAD6]{designide280.bpl} DesignEditors.TIntegerProperty.GetValue (Line 1304, "DesignEditors.pas" + 5) + $2
[20FB7266]{designide280.bpl} VCLEditors.GetDisplayValue (Line 930, "VCLEditors.pas" + 3) + $6
[21148A67]{vclide280.bpl} PropBox.TCustomPropListBox.DrawPropItem (Line 1144, "PropBox.pas" + 316) + $9
[21149182]{vclide280.bpl} PropBox.TCustomPropListBox.CNDrawItem (Line 1337, "PropBox.pas" + 12) + $2E
[50CE7D62]{vcl280.bpl } Vcl.Controls.TControl.WndProc (Line 7548, "Vcl.Controls.pas" + 91) + $6
[5006159C]{rtl280.bpl } System.@TryFinallyExit (Line 23374, "System.pas" + 8) + $0
[50DEDD07]{vcl280.bpl } Vcl.Themes.TStyleManager.GetStyle (Line 5800, "Vcl.Themes.pas" + 18) + $1E
[50CE981A]{vcl280.bpl } Vcl.Controls.TControl.GetStyleName (Line 8578, "Vcl.Controls.pas" + 1) + $8
[5006031F]{rtl280.bpl } System.TObject.Dispatch (Line 18844, "System.pas" + 11) + $0
[50DF1BD9]{vcl280.bpl } Vcl.Themes.TStyleHook.WndProc (Line 7689, "Vcl.Themes.pas" + 38) + $6
[50DF1DBA]{vcl280.bpl } Vcl.Themes.TMouseTrackControlStyleHook.WndProc (Line 7788, "Vcl.Themes.pas" + 1) + $4
[50E33928]{vcl280.bpl } Vcl.Forms.TScrollingStyleHook.WndProc (Line 14823, "Vcl.Forms.pas" + 0) + $0
[50D1A5E8]{vcl280.bpl } Vcl.StdCtrls.TListBoxStyleHook.WndProc (Line 11157, "Vcl.StdCtrls.pas" + 21) + $4
[50DF13FE]{vcl280.bpl } Vcl.Themes.TStyleHook.HandleMessage (Line 7394, "Vcl.Themes.pas" + 20) + $6
[50F11672]{vcl280.bpl } Vcl.Styles.TStyleEngine.HandleMessage (Line 3601, "Vcl.Styles.pas" + 22) + $7
[50064C4A]{rtl280.bpl } System.@FinalizeArray (Line 33067, "System.pas" + 80) + $3
[6137C1FD]{TMSMemInsightPkgDXE14.bpl} Tms.Mi.Mainform.TCheckBox.CNCommand + $225
[50DEDE38]{vcl280.bpl } Vcl.Themes.TStyleManager.HandleMessage (Line 5858, "Vcl.Themes.pas" + 11) + $11
[50CEAEC7]{vcl280.bpl } Vcl.Controls.TWinControl.DoHandleStyleMessage (Line 9412, "Vcl.Controls.pas" + 0) + $F
[50CECE79]{vcl280.bpl } Vcl.Controls.TWinControl.WndProc (Line 10583, "Vcl.Controls.pas" + 170) + $6
[50D13E37]{vcl280.bpl } Vcl.StdCtrls.TCustomListBox.WndProc (Line 7857, "Vcl.StdCtrls.pas" + 55) + $5
[50CE7998]{vcl280.bpl } Vcl.Controls.TControl.Perform (Line 7326, "Vcl.Controls.pas" + 10) + $8
[50CECFD3]{vcl280.bpl } Vcl.Controls.DoControlMsg (Line 10652, "Vcl.Controls.pas" + 12) + $11
[50CEDBB6]{vcl280.bpl } Vcl.Controls.TWinControl.WMDrawItem (Line 10981, "Vcl.Controls.pas" + 1) + $8
[50CE7D62]{vcl280.bpl } Vcl.Controls.TControl.WndProc (Line 7548, "Vcl.Controls.pas" + 91) + $6
[6137C1FD]{TMSMemInsightPkgDXE14.bpl} Tms.Mi.Mainform.TCheckBox.CNCommand + $225
[50CECF05]{vcl280.bpl } Vcl.Controls.TWinControl.DefaultHandler (Line 10611, "Vcl.Controls.pas" + 17) + $10
[500D5912]{rtl280.bpl } System.Generics.Defaults.Equals_Class (Line 1138, "System.Generics.Defaults.pas" + 1) + $6
[50F160DB]{vcl280.bpl } Vcl.Styles.{System.Generics.Collections}TDictionary<System.Classes.TComponent,Vcl.Themes.TStyleHook>.GetBucketIndex (Line 7098, "System.Generics.Collections.pas" + 16) + $15
[50DC3D01]{vcl280.bpl } Vcl.ExtCtrls.TPanelStyleHook.AcceptMessage (Line 12435, "Vcl.ExtCtrls.pas" + 1) + $2
[50DF13A7]{vcl280.bpl } Vcl.Themes.TStyleHook.HandleMessage (Line 7377, "Vcl.Themes.pas" + 3) + $6
[50F11672]{vcl280.bpl } Vcl.Styles.TStyleEngine.HandleMessage (Line 3601, "Vcl.Styles.pas" + 22) + $7
[50064C4A]{rtl280.bpl } System.@FinalizeArray (Line 33067, "System.pas" + 80) + $3
[6137C1FD]{TMSMemInsightPkgDXE14.bpl} Tms.Mi.Mainform.TCheckBox.CNCommand + $225
[50DEDE38]{vcl280.bpl } Vcl.Themes.TStyleManager.HandleMessage (Line 5858, "Vcl.Themes.pas" + 11) + $11
[50CEAEC7]{vcl280.bpl } Vcl.Controls.TWinControl.DoHandleStyleMessage (Line 9412, "Vcl.Controls.pas" + 0) + $F
[50CECE79]{vcl280.bpl } Vcl.Controls.TWinControl.WndProc (Line 10583, "Vcl.Controls.pas" + 170) + $6
[50CEC3F4]{vcl280.bpl } Vcl.Controls.TWinControl.MainWndProc (Line 10271, "Vcl.Controls.pas" + 3) + $6
[50174A20]{rtl280.bpl } System.Classes.StdWndProc (Line 18375, "System.Classes.pas" + 8) + $0
[21805B27]{vclactnband280.bpl} Vcl.ActnMenus.CallWindowHook (Line 762, "Vcl.ActnMenus.pas" + 20) + $F
[50CECF81]{vcl280.bpl } Vcl.Controls.TWinControl.DefaultHandler (Line 10624, "Vcl.Controls.pas" + 30) + $19
[50CED183]{vcl280.bpl } Vcl.Controls.TWinControl.PaintWindow (Line 10707, "Vcl.Controls.pas" + 9) + $4
[50CED039]{vcl280.bpl } Vcl.Controls.TWinControl.PaintHandler (Line 10667, "Vcl.Controls.pas" + 4) + $14
[50CED834]{vcl280.bpl } Vcl.Controls.TWinControl.WMPaint (Line 10870, "Vcl.Controls.pas" + 6) + $5
[50093CB3]{rtl280.bpl } System.SysUtils.AnsiCompareText (Line 7216, "System.SysUtils.pas" + 1) + $2F
[50D142CC]{vcl280.bpl } Vcl.StdCtrls.TCustomListBox.WMPaint (Line 8047, "Vcl.StdCtrls.pas" + 6) + $6
[50CE7D62]{vcl280.bpl } Vcl.Controls.TControl.WndProc (Line 7548, "Vcl.Controls.pas" + 91) + $6
[5006159C]{rtl280.bpl } System.@TryFinallyExit (Line 23374, "System.pas" + 8) + $0
[50DEDD07]{vcl280.bpl } Vcl.Themes.TStyleManager.GetStyle (Line 5800, "Vcl.Themes.pas" + 18) + $1E
[50CE981A]{vcl280.bpl } Vcl.Controls.TControl.GetStyleName (Line 8578, "Vcl.Controls.pas" + 1) + $8
[5006031F]{rtl280.bpl } System.TObject.Dispatch (Line 18844, "System.pas" + 11) + $0
[50DF1BD9]{vcl280.bpl } Vcl.Themes.TStyleHook.WndProc (Line 7689, "Vcl.Themes.pas" + 38) + $6
[50DF1DBA]{vcl280.bpl } Vcl.Themes.TMouseTrackControlStyleHook.WndProc (Line 7788, "Vcl.Themes.pas" + 1) + $4
[5005FF96]{rtl280.bpl } System.TObject.GetInterface (Line 18383, "System.pas" + 7) + $9
[500689A0]{rtl280.bpl } System.@IntfClear (Line 38564, "System.pas" + 10) + $0
[50064C4A]{rtl280.bpl } System.@FinalizeArray (Line 33067, "System.pas" + 80) + $3
[6137C1FD]{TMSMemInsightPkgDXE14.bpl} Tms.Mi.Mainform.TCheckBox.CNCommand + $225
[50DEDE38]{vcl280.bpl } Vcl.Themes.TStyleManager.HandleMessage (Line 5858, "Vcl.Themes.pas" + 11) + $11
[50CEAEC7]{vcl280.bpl } Vcl.Controls.TWinControl.DoHandleStyleMessage (Line 9412, "Vcl.Controls.pas" + 0) + $F
[50CECE79]{vcl280.bpl } Vcl.Controls.TWinControl.WndProc (Line 10583, "Vcl.Controls.pas" + 170) + $6
[50D13E37]{vcl280.bpl } Vcl.StdCtrls.TCustomListBox.WndProc (Line 7857, "Vcl.StdCtrls.pas" + 55) + $5
[50CEC3F4]{vcl280.bpl } Vcl.Controls.TWinControl.MainWndProc (Line 10271, "Vcl.Controls.pas" + 3) + $6
[50174A20]{rtl280.bpl } System.Classes.StdWndProc (Line 18375, "System.Classes.pas" + 8) + $0
[21805B27]{vclactnband280.bpl} Vcl.ActnMenus.CallWindowHook (Line 762, "Vcl.ActnMenus.pas" + 20) + $F
[50E2D5B8]{vcl280.bpl } Vcl.Forms.TApplication.ProcessMessage (Line 11315, "Vcl.Forms.pas" + 2) + $9
[50E2D6DA]{vcl280.bpl } Vcl.Forms.TApplication.HandleMessage (Line 11366, "Vcl.Forms.pas" + 1) + $4
[50E2DA19]{vcl280.bpl } Vcl.Forms.TApplication.Run (Line 11505, "Vcl.Forms.pas" + 27) + $3
[004F7FA2]{bds.exe } bds.bds (Line 227, "" + 16) + $2
Any idea?