I'm using gnuradio-next (testing CMake and such). If I use the OpenGL FFT in GRC, and click the "Persistence" checkbox, the flowgraph crashes and spits this out:
File "/usr/lib/python2.7/site-packages/OpenGL/error.py", line 208, in glCheckError
baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
err = 1282,
description = 'invalid operation',
baseOperation = glAccum,
cArguments = (GL_LOAD, 1.0)
)
If I don't use OpenGL, the persistence feature works just fine. Has anyone else seen this error before?