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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi All,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I found where the problem is: “iren->Start()”. “iren” is the vtkRenderWindowInteractor I defined in my program. If I delete this sentence “iren->Start()”, then I can close both GUI and console windows without warning message “QObject::killTimers: timers cannot be stopped from another thread”. Otherwise, the problem I described in the previous Email will occur. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>However, for seed point selection, I need “iren->Start()”. Then what should I do to solve the problem?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Best,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Xiaopeng<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Xiaopeng Yang<br><b>Sent:</b> Friday, June 24, 2011 4:07 PM<br><b>To:</b> 'vtk'; insight-users@itk.org<br><b>Subject:</b> [vtkusers] QT, VTK, and ITK combined program exit problem<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Dear Users,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I made a program based on QT, VTK, and ITK. When I run the program, there are GUI window and console window. When I click “exit” button in the GUI window, the GUI window exits but the console window doesn’t. When I click “exit” button in the console window, there is a message: QObject::killTimers: timers cannot be stopped from another thread. If someone already had a similar experience, please could you share your knowledge?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you very much.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best regards,<o:p></o:p></p><p class=MsoNormal>Xiaopeng<o:p></o:p></p></div></body></html>