Hi,
I have generated a TH3F histogram, and it shows up correctly on the Canvas. but when I want to view it in OpenGL (by selecting it from the “View” menu) it get the following error:
Root > Error in TGLLockable::TakeLock: ‘TGLSceneBase unnamed-1’ unable to take DrawLock, already ModifyLock
Warning in TGLViewerBase::PreRender: locking of scene ‘unnamed-1’ failed, skipping.
Error in TGLLockable::TakeLock: ‘TGLSceneBase unnamed-1’ unable to take DrawLock, already ModifyLock
Warning in TGLViewerBase::PreRender: locking of scene ‘unnamed-1’ failed, skipping.
The window shows up, but only with a white screen where the rendering should have been.