# Create multiple render windows and got "failed at glDeleteFramebuffers 16 OpenGL errors detected" error when closing application
**URL:** https://discourse.vtk.org/t/create-multiple-render-windows-and-got-failed-at-gldeleteframebuffers-16-opengl-errors-detected-error-when-closing-application/14682
**Category:** Support
**Created:** [October 9, 2024, 4:08am UTC](https://discourse.vtk.org/t/create-multiple-render-windows-and-got-failed-at-gldeleteframebuffers-16-opengl-errors-detected-error-when-closing-application/14682 "2024-10-09T04:08:08Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@cyfgod](https://discourse.vtk.org/u/cyfgod)
#### Post date: [October 9, 2024, 4:08am UTC](https://discourse.vtk.org/t/create-multiple-render-windows-and-got-failed-at-gldeleteframebuffers-16-opengl-errors-detected-error-when-closing-application/14682/1 "2024-10-09T04:08:08Z")
Hello everyone,
In our scenario, we use StackLayout to switch different user’s DICOM render image in QML.
For example:
```auto
StackLayout {
id: multi_viewer
Layout.preferredWidth: 800
Layout.preferredHeight: 768
Layout.alignment: Qt.AlignTop | Qt.AlignLeft
currentIndex: 0
GridLayout {
columns: 1
rows: 1
columnSpacing: 10
VTKRenderWindow {
id: renderWin_0
objectName: "renderWin_0"
}
VTKRenderItem {
width: 395
height: 368
id: renderItem_0_0
objectName: "renderItem_0_0"
renderWindow: renderWin_0
}
Component.onCompleted : {
viewerPresenter.init(0, renderWin_0, renderItem_0_0)
}
}
GridLayout {
columns: 1
rows: 1
columnSpacing: 10
VTKRenderWindow {
id: renderWin_1
objectName: "renderWin_1"
}
VTKRenderItem {
width: 395
height: 368
id: renderItem_1_0
objectName: "renderItem_1_0"
renderWindow: renderWin_1
}
Component.onCompleted : {
viewerPresenter.init(1, renderWin_1, renderItem_1_0)
}
}
```
And use a button to switch card
```auto
Button {
text: "Switch card"
onClicked: {
var index = multi_viewer.currentIndex
multi_viewer.currentIndex = index === 0 ? 1 : 0
}
}
```
It works fine. Once click button to switch render window and then close application, got error in VTK console. If don’t switch render window, no error thrown.
```auto
“OperationWorkbench.exe”(Win32): 已加载“C:\Windows\WinSxS\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.19041.4355_none_60b8b9eb71f62e16\comctl32.dll”。
ERROR: In vtkOpenGLFramebufferObject.cxx, line 356
vtkOpenGLFramebufferObject (000002458F367290): failed at glDeleteFramebuffers 16 OpenGL errors detected
0 : (1282) Invalid operation
1 : (1282) Invalid operation
2 : (1282) Invalid operation
3 : (1282) Invalid operation
4 : (1282) Invalid operation
5 : (1282) Invalid operation
6 : (1282) Invalid operation
7 : (1282) Invalid operation
8 : (1282) Invalid operation
9 : (1282) Invalid operation
10 : (1282) Invalid operation
11 : (1282) Invalid operation
12 : (1282) Invalid operation
13 : (1282) Invalid operation
14 : (1282) Invalid operation
15 : (1282) Invalid operation
ERROR: In vtkOpenGLFramebufferObject.cxx, line 356
vtkOpenGLFramebufferObject (000002458F368B00): failed at glDeleteFramebuffers 16 OpenGL errors detected
0 : (1282) Invalid operation
1 : (1282) Invalid operation
2 : (1282) Invalid operation
3 : (1282) Invalid operation
4 : (1282) Invalid operation
5 : (1282) Invalid operation
6 : (1282) Invalid operation
7 : (1282) Invalid operation
8 : (1282) Invalid operation
9 : (1282) Invalid operation
10 : (1282) Invalid operation
11 : (1282) Invalid operation
12 : (1282) Invalid operation
13 : (1282) Invalid operation
14 : (1282) Invalid operation
15 : (1282) Invalid operation
ERROR: In vtkOpenGLFramebufferObject.cxx, line 356
vtkOpenGLFramebufferObject (000002458F366D40): failed at glDeleteFramebuffers 16 OpenGL errors detected
0 : (1282) Invalid operation
1 : (1282) Invalid operation
2 : (1282) Invalid operation
3 : (1282) Invalid operation
4 : (1282) Invalid operation
5 : (1282) Invalid operation
6 : (1282) Invalid operation
7 : (1282) Invalid operation
8 : (1282) Invalid operation
9 : (1282) Invalid operation
10 : (1282) Invalid operation
11 : (1282) Invalid operation
12 : (1282) Invalid operation
13 : (1282) Invalid operation
14 : (1282) Invalid operation
15 : (1282) Invalid operation
ERROR: In vtkOpenGLFramebufferObject.cxx, line 356
vtkOpenGLFramebufferObject (000002458F368390): failed at glDeleteFramebuffers 16 OpenGL errors detected
0 : (1282) Invalid operation
1 : (1282) Invalid operation
2 : (1282) Invalid operation
3 : (1282) Invalid operation
4 : (1282) Invalid operation
5 : (1282) Invalid operation
6 : (1282) Invalid operation
7 : (1282) Invalid operation
8 : (1282) Invalid operation
9 : (1282) Invalid operation
10 : (1282) Invalid operation
11 : (1282) Invalid operation
12 : (1282) Invalid operation
13 : (1282) Invalid operation
14 : (1282) Invalid operation
15 : (1282) Invalid operation
ERROR: In vtkOpenGLFramebufferObject.cxx, line 356
vtkOpenGLFramebufferObject (00000245929E1130): failed at glDeleteFramebuffers 16 OpenGL errors detected
0 : (1282) Invalid operation
1 : (1282) Invalid operation
2 : (1282) Invalid operation
3 : (1282) Invalid operation
4 : (1282) Invalid operation
5 : (1282) Invalid operation
6 : (1282) Invalid operation
7 : (1282) Invalid operation
8 : (1282) Invalid operation
9 : (1282) Invalid operation
10 : (1282) Invalid operation
11 : (1282) Invalid operation
12 : (1282) Invalid operation
13 : (1282) Invalid operation
14 : (1282) Invalid operation
15 : (1282) Invalid operation
```
Any suggestions？
Thanks a lot!
---
### Author:  [@jaswantp](https://discourse.vtk.org/u/jaswantp)
#### Post date: [October 9, 2024, 2:45pm UTC](https://discourse.vtk.org/t/create-multiple-render-windows-and-got-failed-at-gldeleteframebuffers-16-opengl-errors-detected-error-when-closing-application/14682/2 "2024-10-09T14:45:34Z")
@sankhesh