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Isaac Sim VS Code Edition 0.4.0 bug
Detailed Description
The other day Isaac Sim VS Code Edition got upgraded to 0.4.0. It took me 3 hrs to understand that the bug is not in my code but the new version. Namely when running the code with the extension (any code even import with print is sufficient: import omni.timeline’ print(“Success”)) there is not return to the output console in the vs code. I tested the run, the bridge recives the code and prints in the isaac sim console but there is no return the the vs code. Im assuming the server reply is not handled or something. Example code:
import carb, omni.usd
from pxr import UsdGeom
carb.log_warn(“>>> VS CODE BRIDGE REACHED KIT <<<”)
UsdGeom.Xform.Define(omni.usd.get_context().get_stage(), “/World/VSCodeBridgeTest”)
Thanks for reporting this, and sorry it ate 3 hours of debugging – that’s frustrating.
What’s Happening
This is a version mismatch between the VS Code marketplace extension and the Isaac Sim Kit-side extension. Here’s the breakdown:
Isaac Sim 5.1.0 ships with isaacsim.code_editor.vscodev1.1.0, which contains its own built-in TCP server for code execution.
Isaac Sim 6.0.0 refactored this into two extensions: isaacsim.code_editor.vscode (v1.2.3, now just a launcher/UI) + a newisaacsim.code_editor.python_server (v1.3.0) that handles code execution with an updated wire protocol.
The VS Code marketplace extension v0.4.0 was updated to work with the 6.0.0 protocol. When it talks to the older 5.1.0 server, the code executes on the Kit side (which is why you see the output in the Isaac Sim console), but the response doesn’t make it back to VS Code due to protocol incompatibilities (the new client expects EOF-based message framing and a different response lifecycle than the 5.1.0 server provides).
Workaround
Option 1 – Downgrade the VS Code extension (quickest fix):
Open VS Code
Go to Extensions (Ctrl+Shift+X), find Isaac Sim VS Code Edition
Click the gear icon > Install Another Version…
Select 0.3.x (the last version compatible with 5.1.0’s built-in server)
Option 2 – Upgrade to Isaac Sim 6.0.0:
Isaac Sim 6.0.0 includes the new isaacsim.code_editor.python_server extension that the VS Code 0.4.0 client expects. If upgrading is an option for your workflow, the VS Code extension will work out of the box.
From the 6.0.0 VS Code docs: “The isaacsim.code_editor.vscode extension […] depends on the isaacsim.code_editor.python_server extension which provides the TCP server for remote Python code execution.”
Going Forward
The VS Code marketplace extension auto-updates by default. To prevent this from happening again while you’re on 5.1.0, you can disable auto-updates for this specific extension: click the gear icon on the extension > Auto Update (toggle it off). That way you stay on a version compatible with your Isaac Sim installation.