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Question

Getting a weird message on VS code plugin

  • October 20, 2026
  • 1 reply
  • 18 views

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Getting the message below when trying to run “IFS: Select code generator target version:

 

The bundled verification helper returned invalid output while checking ifs-dev-buildtasks.jar. The downloaded file was discarded and the existing code generator is unchanged.

 

Anyone have any idea how to fix it?

 

Thanks,

1 reply

That error looks like the extension downloaded a new ifs-dev-buildtasks.jar but its verification step failed, so it kept your existing code generator. Nothing is broken, but you can’t switch versions right now.

Things to try:

Open View > Output in VS Code, select the IFS extension, and check the log. It usually shows the real cause, possibly a Java error, or a checksum mismatch. 
Run java -version and confirm it matches what the IFS dev setup requires. A wrong or missing Java can make the helper return invalid output. It needs a java version greater than 11.
Close VS Code, delete any cached ifs-dev-buildtasks.jar (the log shows the path), reopen, and retry.
Update or reinstall the IFS extension, then run Developer: Reload Window.

If it still fails, post the Output panel text here and we can take a closer look