How to fix AssertionError in Stim Sinter.collect?

How to fix AssertionError in Stim Sinter.collect? Ask Question Asked 9 months ago Modified today Viewed 235 times 0 I am running Sinter to find the logical error rate by running my .stim files. But I keep getting this error. I looked into another question posted in this platform regarding AssertionError, and the solution advised was to use a new version of stim stim~=1.16.dev. I tried it, and I also tried changing the versions of stim and sinter. But I still keep getting the same error message. What might me the problem, and how can I resolve this? AssertionError The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/pritesht/.conda/envs/qec/bin/sinter", line 8, in <module> sys.exit(main()) ^^^^^^ File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_command/_main.py", line 15, in main return main_collect(command_line_args=command_line_args[1:]) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_command/_main_collect.py", line 329, in main_collect collect( File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_collection/_collection.py", line 404, in collect for progress in iter_collect( File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_collection/_collection.py", line 226, in iter_collect manager.process_message() File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_collection/_collection_manager.py", line 385, in process_message raise RuntimeError(f'Worker failed: traceback={traceback}') from ex RuntimeError: Worker failed: traceback=Traceback (most recent call last): File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_collection/_collection_worker_state.py", line 246, in run_message_loop did_some_work = self.do_some_work() ^^^^^^^^^^^^^^^^^^^ File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_collection/_collection_worker_state.py", line 217, in do_some_work some_work_done = self.compiled_sampler.sample(self.current_task_shots_left) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_collection/_sampler_ramp_throttled.py", line 51, in sample result = self.sub_sampler.sample(actual_shots) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_decoding/_stim_then_decode_sampler.py", line 216, in sample return AnonTaskStats( ^^^^^^^^^^^^^^ File "<string>", line 8, in __init__ File "/home/pritesht/.conda/envs/qec/lib/python3.11/site-packages/sinter/_data/_anon_task_stats.py", line 37, in __post_init__ assert isinstance(self.errors, int) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AssertionError ``` error-correctionstimsinter Share Improve this question Follow asked Jul 20, 2025 at 19:44 Pritesh Thakur 212 2 bronze badges Add a comment 1 Answer Sorted by: Highest score (default) Date modified (newest first) Date created (oldest first) 0 This was fixed in https://github.com/quantumlib/Stim/pull/965. This means that this error will be fixed at the next stable release of the stim package. If you cannot/do not want to wait for the next stable release, you can install one of the last pre-release that should include that fix with pip install stim==1.16.dev1751171094. You can also solve this error by downgrading numpy to version 2.2 (or at least <2.3) with pip install -U 'numpy<2.3'. Share Improve this answer Follow answered Jul 20, 2025 at 20:16 Adrien Suau 5,49025 25 silver badges 60 60 bronze badges I did that. This is what i have right now stim 1.16.dev1751171094 sinter 1.15.0 numpy 2.3.1 And still, I am getting the same error: assert isinstance(self.errors, int) ``` ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ``` AssertionError Am I doing something wrong? Can you please help me fix this? –  Pritesh Thakur Commented Jul 20, 2025 at 22:04 Are you sure you are using the right python exacutable? Try downgrading numpy just to see if that works. –  Adrien Suau Commented Jul 21, 2025 at 5:07 1 Yes, later I tried using stim 1.15, and downgraded numpy to 2.2, and it worked. Thanks a lot. –  Pritesh Thakur Commented Jul 21, 2025 at 16:47 Add a comment Your Answer Sign up or log in Sign up using Google Sign up using Email and Password Post as a guest Name Email Required, but never shown Post Your Answer By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy. Start asking to get answers Find the answer to your question by asking. Ask question Explore related questions error-correctionstimsinter See similar questions with these tags. The Overflow Blog Human input needed: take our survey on AI agents Who needs VCs when you have friends like these? 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