[osg-users] Invalid Operation after applying attribute Viewport

[Bruno Oliveira]

Hello, I am getting the following error in an OSG viewer, with a
osgViewer::GraphisWindowEmbedded into a QOpenGLWidget:


detected OpenGL error 'invalid operation' after applying attribute Viewport
0x7f93fbe97170



I get this error every time I call QOpenGLWidget::update(). This happens
only under MacOS X (I have Qt 5.7 and OSG 3.4). This does not happen under
Linux. I know this is insufficient information for any debug. But how can I
get more details to debug this?
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