Error Message:
----------------------------------------
Access violation at address 0040386E in module 'IBExpert.exe'. Read of address FFFFFFDD

[0040386E] System.@IsClass + $A
[00403BDF] System.@HandleAnyException + $33
[009A230D] dxTL.TCustomdxTreeListControl.DoDrawCell (Line 20238, "dxTL.pas" + 7) + $3E
[009972A5] dxTL.TCustomdxTreeList.DrawCellEx (Line 14496, "dxTL.pas" + 33) + $40
[0098D1D1] dxTL.DrawCells (Line 8993, "dxTL.pas" + 425) + $C8
[0098EA2D] dxTL.TCustomdxTreeList.Paint (Line 9425, "dxTL.pas" + 44) + $1
[0045C263] Controls.TCustomControl.PaintWindow (Line 8209, "Controls.pas" + 6) + $5
[004580DE] Controls.TWinControl.PaintHandler (Line 5788, "Controls.pas" + 4) + $13
[004585AB] Controls.TWinControl.WMPaint (Line 5923, "Controls.pas" + 6) + $4
[00458643] Controls.TWinControl.WMPaint (Line 5936, "Controls.pas" + 19) + $4
[0045C1FC] Controls.TCustomControl.WMPaint (Line 8198, "Controls.pas" + 2) + $4
[0098EC9C] dxTL.TCustomdxTreeList.WndProc (Line 9517, "dxTL.pas" + 47) + $4
[00444388] Forms.StdWndProc (Line 1459, "Forms.pas" + 8) + $0
[0044DB97] Forms.TApplication.ProcessMessage (Line 6630, "Forms.pas" + 13) + $1
[00FAB281] IBEErrorF.IBEError (Line 39, "IBEErrorF.pas" + 5) + $5
[00FF0025] Main.TIBEMainForm.AppEventsException (Line 11568, "Main.pas" + 23) + $3
[0044DE81] Forms.TApplication.HandleException (Line 6752, "Forms.pas" + 6) + $F
[00444388] Forms.StdWndProc (Line 1459, "Forms.pas" + 8) + $0
[009922BF] dxTL.TCustomdxTreeList.UpdateDragging (Line 11236, "dxTL.pas" + 1) + $8
[00454C39] Controls.TControl.DoDragMsg (Line 3964, "Controls.pas" + 18) + $1C

IBExpertНикому не говори версию эксперта.
2019.4.27.1

Подключил в настройках хранение конфигов в БД, проблема исчезла