Couldn't find function glOrthof
   [Condition of type SIMPLE-ERROR]

Restarts:
 0: [RETRY] Retry SLIME REPL evaluation request.
 1: [*ABORT] Return to SLIME's top level.
 2: [ABORT] abort thread (#<THREAD "repl-thread" RUNNING {1003A28033}>)

Backtrace:
  0: (CL-OPENGL-BINDINGS::GENERATE-GL-FUNCTION "glOrthof" CL-OPENGL-BINDINGS:ORTHO-F :VOID ((CL-OPENGL-BINDINGS::L CL-OPENGL-BINDINGS:FLOAT) (CL-OPENGL-BINDINGS::R CL-OPENGL-BINDINGS:FLOAT) (CL-OPENGL-BIND..
  1: (XELF:START-SESSION)
  2: (3X0NG:3X0NG)
  3: (SB-INT:SIMPLE-EVAL-IN-LEXENV (3X0NG:3X0NG) #<NULL-LEXENV>)
  4: (EVAL (3X0NG:3X0NG))