mujoco.FatalError: Default framebuffer is not complete, error 0x0

[JakobThumm]

When trying to train a diffusion policy

python train.py --config ../exps/templates/diffusion_policy.json --dataset ../../data/lift/ph/low_dim_v15.hdf5

I get the following error:

Traceback (most recent call last):
  File "/home/jakob/Promotion/code/robomimic/robomimic/scripts/train.py", line 504, in main
    train(config, device=device, resume=args.resume)
    ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jakob/Promotion/code/robomimic/robomimic/scripts/train.py", line 368, in train
    all_rollout_logs, video_paths = TrainUtils.rollout_with_stats(
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        policy=rollout_model,
        ^^^^^^^^^^^^^^^^^^^^^
    ...<8 lines>...
        terminate_on_success=config.experiment.rollout.terminate_on_success,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/home/jakob/Promotion/code/robomimic/robomimic/utils/train_utils.py", line 482, in rollout_with_stats
    rollout_info = run_rollout(
        policy=policy,
    ...<6 lines>...
        terminate_on_success=terminate_on_success,
    )
  File "/home/jakob/Promotion/code/robomimic/robomimic/utils/train_utils.py", line 357, in run_rollout
    frame = env.render(mode="rgb_array", height=512, width=512)
  File "/home/jakob/Promotion/code/robomimic/robomimic/envs/wrappers.py", line 86, in hooked
    result = orig_attr(*args, **kwargs)
  File "/home/jakob/Promotion/code/robomimic/robomimic/envs/env_robosuite.py", line 233, in render
    im = self.env.sim.render(height=height, width=width, camera_name=camera_name)
  File "/home/jakob/anaconda3/envs/hrgym/lib/python3.13/site-packages/robosuite/utils/binding_utils.py", line 1138, in render
    self._render_context_offscreen.render(
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        width=width, height=height, camera_id=camera_id, segmentation=segmentation
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/home/jakob/anaconda3/envs/hrgym/lib/python3.13/site-packages/robosuite/utils/binding_utils.py", line 137, in render
    self.update_offscreen_size(new_width, new_height)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jakob/anaconda3/envs/hrgym/lib/python3.13/site-packages/robosuite/utils/binding_utils.py", line 125, in update_offscreen_size
    self._set_mujoco_context_and_buffers()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/jakob/anaconda3/envs/hrgym/lib/python3.13/site-packages/robosuite/utils/binding_utils.py", line 116, in _set_mujoco_context_and_buffers
    self.con = mujoco.MjrContext(self.model._model, mujoco.mjtFontScale.mjFONTSCALE_150)
               ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
mujoco.FatalError: Default framebuffer is not complete, error 0x0

I can circumvent that error by disabling the rollouts in the config

"rollout": {
    "enabled": false,
    "n": 50,
    "horizon": 400,
    "rate": 50,
    "warmstart": 0,
    "terminate_on_success": true
},

But it would be great to have the episode validation.