The error was 'GLXBadDrawable'.

Hi there,

  I have a program that open *one* X11 'Display' and then within a
loop I create a X11 'Window' & an associated GLXContext.
  It works fine for the first ~450 windows but simply seg fault on the
glXMakeCurrent call with:

....
The error was 'GLXBadDrawable'.
  (Details: serial 36264 error_code 158 request_code 143 minor_code
26)
....

  Is there some kind of maximum number of glx context I can open
within the same Display ? If so how can I request this max number ?

Thanks
-Mathieu