Fixes env test failure for Isaac-Stack-Cube-Franka-IK-Rel-Blueprint-v0 (#2156)

# Description

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Fixes the environment test failure for
Isaac-Stack-Cube-Franka-IK-Rel-Blueprint-v0. The env uses a custom image
observation term which tries to access an element in the recorder
manager. During env creation, the observation manager is initialized
before the recorder manager, thus causing an error in the observation
term. The custom image obs term has been updated to only try to access
the element in the recorder manager if it exists.

Fixes # (issue)

Environment test failure of Isaac-Stack-Cube-Franka-IK-Rel-Blueprint-v0

## Type of change

- Bug fix (non-breaking change which fixes an issue)

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## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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---------

Co-authored-by: Kelly Guo <kellyg@nvidia.com>

Author: peterd-NV

source/isaaclab/isaaclab/managers/recorder_manager.py

@@ -223,6 +223,8 @@ def exported_successful_episode_count(self, env_id=None) -> int:
         Returns:
             The number of successful episodes.
         """
+        if not hasattr(self, "_exported_successful_episode_count"):
+            return 0
         if env_id is not None:
             return self._exported_successful_episode_count.get(env_id, 0)
         return sum(self._exported_successful_episode_count.values())
@@ -237,6 +239,8 @@ def exported_failed_episode_count(self, env_id=None) -> int:
         Returns:
             The number of failed episodes.
         """
+        if not hasattr(self, "_exported_failed_episode_count"):
+            return 0
         if env_id is not None:
             return self._exported_failed_episode_count.get(env_id, 0)
         return sum(self._exported_failed_episode_count.values())

source/isaaclab_tasks/config/extension.toml

@@ -1,7 +1,7 @@
 [package]
 
 # Note: Semantic Versioning is used: https://semver.org/
-version = "0.10.26"
+version = "0.10.27"
 
 # Description
 title = "Isaac Lab Environments"

source/isaaclab_tasks/docs/CHANGELOG.rst

@@ -1,6 +1,15 @@
 Changelog
 ---------
 
+0.10.27 (2025-03-25)
+~~~~~~~~~~~~~~~~~~~~
+
+Fixed
+^^^^^
+
+* Fixed environment test failure for ``Isaac-Stack-Cube-Franka-IK-Rel-Blueprint-v0``.
+
+
 0.10.26 (2025-03-18)
 ~~~~~~~~~~~~~~~~~~~~
 

source/isaaclab_tasks/isaaclab_tasks/manager_based/manipulation/stack/config/franka/stack_ik_rel_blueprint_env_cfg.py

@@ -84,7 +84,9 @@ def image(
         if images.dtype == torch.uint8:
             images = images.float() / 255.0
         # Get total successful episodes
-        total_successes = sum(env.recorder_manager._exported_successful_episode_count.values())
+        total_successes = 0
+        if hasattr(env, "recorder_manager") and env.recorder_manager is not None:
+            total_successes = env.recorder_manager.exported_successful_episode_count
 
         for tile in range(images.shape[0]):
             tile_chw = torch.swapaxes(images[tile : tile + 1].unsqueeze(1), 1, -1).squeeze(-1)