Hi all, How can I resolve this problem
> line 309, in get_rgba X = readpng(pngfile) RuntimeError:
> _image_module::readpng could not open PNG file
My guess is that this is a gtk threading problem. I've seen similar
problems with recent gtk releases. The problem is that the texmanager
issues os.popen and returns before the command is finished. We need
a GUI dependent safe way to run system commands that blocks execution
until the system command returns.
See my August thread to the pygtk mailing list
David Aitel points to a recipe in his book
But this hasn't been implemented yet. Try flushing your tex cache and
rerunning under tkagg which will fix the problem, I suspect.
Basically we need a backend run_system command for each backend.