Error when trying to show unit test manger

I got the following error when clicking the Unit Test Manager Toolbar button.

Exception

Call Stack
Call Stack Information:
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Methods |Details|Stack           |Address         |Module      |Offset          |Source             |Unit           |Class               |Procedure/Method              |Line                          |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|*Exception Thread: ID=24756; Parent=0; Priority=0                                                                                                                                                      |
|Class=; Name=MAIN                                                                                                                                                                                      |
|DeadLock=0; Wait Chain=                                                                                                                                                                                |
|Comment=                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|7FFFFFFE|04     |0000000000000000|0000000004B979DE|Toad.exe    |0000000000A079DE|cxControls.pas     |cxControls     |TcxControl          |CreateActualCanvasCore        |11151[17]                     |
|00000040|04     |00000000007FF1C8|0000000005DDDB45|Toad.exe    |0000000001C4DB45|dxDockControl.pas  |dxDockControl  |TdxCustomDockControl|DockTo                        |8993[16]                      |
|00000040|04     |00000000007FF228|0000000008FAFD53|Toad.exe    |0000000004E1FD53|DockingSupport.pas |DockingSupport |TDockingMgr         |CreateAndDockModule           |405[57]                       |
|00000040|04     |00000000007FF2F8|000000000A0378E4|Toad.exe    |0000000005EA78E4|dmCommonActions.pas|dmCommonActions|TdmCommonActions    |actUTPLSQLManagerExecute      |3686[2]                       |
|00000040|03     |00000000007FF358|00000000043742EC|Toad.exe    |00000000001E42EC|System.Classes.pas |System.Classes |TBasicAction        |Execute                       |                              |
|00000040|03     |00000000007FF388|0000000004536AC8|Toad.exe    |00000000003A6AC8|Vcl.ActnList.pas   |Vcl.ActnList   |TCustomAction       |Execute                       |                              |
|00000040|03     |00000000007FF3C8|0000000004373ECA|Toad.exe    |00000000001E3ECA|System.Classes.pas |System.Classes |TBasicActionLink    |Execute                       |                              |
|00000040|04     |00000000007FF468|000000000B305763|Toad.exe    |0000000007175763|dxBar.pas          |dxBar          |TdxBarItem          |DoClick                       |22274[5]                      |
|00000040|04     |00000000007FF4A8|000000000B3056AC|Toad.exe    |00000000071756AC|dxBar.pas          |dxBar          |TdxBarItem          |DirectClick                   |22261[5]                      |
|00000040|04     |00000000007FF4F8|000000000B31D125|Toad.exe    |000000000718D125|dxBar.pas          |dxBar          |TdxBarItemControl   |ControlUnclick                |29199[29]                     |
|00000040|04     |00000000007FF578|000000000B3233A4|Toad.exe    |00000000071933A4|dxBar.pas          |dxBar          |TdxBarButtonControl |ControlUnclick                |31426[6]                      |
|00000040|04     |00000000007FF5C8|000000000B342824|Toad.exe    |00000000071B2824|dxBar.pas          |dxBar          |TCustomdxBarControl |DoLButtonUp                   |41625[18]                     |
|00000040|04     |00000000007FF638|000000000B309D81|Toad.exe    |0000000007179D81|dxBar.pas          |dxBar          |TdxBarControl       |DoLButtonUp                   |23773[24]                     |
|00000040|04     |00000000007FF6A8|000000000B340296|Toad.exe    |00000000071B0296|dxBar.pas          |dxBar          |TCustomdxBarControl |WMLButtonUp                   |40851[6]                      |
|00000040|04     |00000000007FF6E8|000000000B301C33|Toad.exe    |0000000007171C33|dxBar.pas          |dxBar          |TdxBarDockedControl |WMLButtonUp                   |20860[8]                      |
|00000040|03     |00000000007FF728|00000000041A1CC1|Toad.exe    |0000000000011CC1|System.pas         |System         |TObject             |Dispatch                      |                              |
|00000040|03     |00000000007FF788|000000000456AB47|Toad.exe    |00000000003DAB47|Vcl.Controls.pas   |Vcl.Controls   |TControl            |WndProc                       |                              |
|00000040|03     |00000000007FF8F8|000000000457279B|Toad.exe    |00000000003E279B|Vcl.Controls.pas   |Vcl.Controls   |TWinControl         |WndProc                       |                              |
|00000040|04     |00000000007FF9C8|000000000B34174B|Toad.exe    |00000000071B174B|dxBar.pas          |dxBar          |TCustomdxBarControl |WndProc                       |41266[39]                     |
|00000040|04     |00000000007FFA18|000000000B30C5B2|Toad.exe    |000000000717C5B2|dxBar.pas          |dxBar          |TdxBarControl       |WndProc                       |24676[52]                     |
|00000040|03     |00000000007FFA68|000000000457186A|Toad.exe    |00000000003E186A|Vcl.Controls.pas   |Vcl.Controls   |TWinControl         |MainWndProc                   |                              |
|00000040|03     |00000000007FFAB8|0000000004375814|Toad.exe    |00000000001E5814|System.Classes.pas |System.Classes |                    |StdWndProc                    |                              |
|00000040|03     |00000000007FFB08|00007FFAA9CE09CC|user32.dll  |00000000001209CC|user32.dll         |user32         |                    |SetThreadCursorCreationScaling|                              |
|00000040|03     |00000000007FFB38|00007FFAA9C6A714|user32.dll  |00000000000AA714|user32.dll         |user32         |                    |SetThreadCursorCreationScaling|                              |
|00000040|03     |00000000007FFC78|00007FFAA9C66BBC|user32.dll  |00000000000A6BBC|user32.dll         |user32         |                    |SetThreadCursorCreationScaling|                              |
|00000040|03     |00000000007FFCD8|00007FFAA9CE03BC|user32.dll  |00000000001203BC|user32.dll         |user32         |                    |SetThreadCursorCreationScaling|                              |
|00000040|04     |00000000007FFD88|0000000004738C9B|Toad.exe    |00000000005A8C9B|Vcl.Forms.pas      |Vcl.Forms      |TApplication        |ProcessMessage                |13277[23]                     |
|00000040|04     |00000000007FFDF8|0000000004738D13|Toad.exe    |00000000005A8D13|Vcl.Forms.pas      |Vcl.Forms      |TApplication        |HandleMessage                 |13307[1]                      |
|00000040|04     |00000000007FFE68|000000000473916A|Toad.exe    |00000000005A916A|Vcl.Forms.pas      |Vcl.Forms      |TApplication        |Run                           |13446[27]                     |
|00000040|04     |00000000007FFEA8|000000000B384DE1|Toad.exe    |00000000071F4DE1|Toad.dpr           |Toad           |                    |initialization                |2156[170]                     |
|00000040|03     |00000000007FFF48|00007FFAABC00A9C|kernel32.dll|00000000000F0A9C|KERNEL32.DLL       |KERNEL32       |                    |uaw_wcsrchr                   |                              |
|00000040|03     |00000000007FFF78|00007FFAABB97C10|kernel32.dll|0000000000087C10|KERNEL32.DLL       |KERNEL32       |                    |uaw_wcsrchr                   |                              |
|00000040|03     |00000000007FFF88|00007FFAAD8BB8D8|ntdll.dll   |00000000001BB8D8|ntdll.dll          |ntdll          |                    |ZwWaitLowEventPair            |                              |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

I can't reproduce this one.

Does it happen consistently?

Does it go away if you right-click here and choose "Restore desktop defaults?" (this just resets docked panel layout - things like ut/plsql manager, sql recall, object palette, etc)

Didn't happen again. After a restart everything works as expected.
Not sure if it ever happen again. :wink: