# Bugs **URL:** https://pyfr.discourse.group/c/bugs/5.md [Latest](https://pyfr.discourse.group/latest.md) · [Categories](https://pyfr.discourse.group/categories.md) · [Tags](https://pyfr.discourse.group/tags.md) --- ## [How to report potential bugs](https://pyfr.discourse.group/t/how-to-report-potential-bugs/14)
**Author:** [@WillT](https://pyfr.discourse.group/u/WillT)\ **Replies:** 0\ **Last updated:** [9 October 2020 00:08 UTC](https://pyfr.discourse.group/t/how-to-report-potential-bugs/14 "2020-10-09T00:08:06Z")
Report potential bugs to the development team and community. This is a place to report potential bugs in the PyFR codebase, please follow standard expectation when reporting. A good bug report, which is complete and sel… --- ## [Dual Integrators Missing Serialiser in v3.0](https://pyfr.discourse.group/t/dual-integrators-missing-serialiser-in-v3-0/1342)
**Author:** [@fredmorin18](https://pyfr.discourse.group/u/fredmorin18)\ **Replies:** 2\ **Last updated:** [22 February 2026 21:32 UTC](https://pyfr.discourse.group/t/dual-integrators-missing-serialiser-in-v3-0/1342 "2026-02-22T21:32:52Z")
Dual integrators missing serialiser Hello, I started transitioning to the 3.0 release from 2.1, and I came upon this issue when running some simulations using the ac-navier-stokes solver. I seem to have fixed it by impo… --- ## [Outputs occurring at incorrect intervals when the timestep is high-precision](https://pyfr.discourse.group/t/outputs-occurring-at-incorrect-intervals-when-the-timestep-is-high-precision/1341)
**Author:** [@second\_moment](https://pyfr.discourse.group/u/second_moment)\ **Replies:** 3\ **Last updated:** [22 February 2026 19:51 UTC](https://pyfr.discourse.group/t/outputs-occurring-at-incorrect-intervals-when-the-timestep-is-high-precision/1341 "2026-02-22T19:51:30Z")
Nature of bug When I set the timestep to be a high-precision number (dt = 0.042735042735042736, pseudo-dt = 0.004273504273504274) and run the simulation for a long-enough time (tend = 1000.0), eventually the times when t… --- ## [restarting from partitioned mesh fails](https://pyfr.discourse.group/t/restarting-from-partitioned-mesh-fails/1327)
**Author:** [@subutai](https://pyfr.discourse.group/u/subutai)\ **Replies:** 27\ **Last updated:** [3 February 2026 13:03 UTC](https://pyfr.discourse.group/t/restarting-from-partitioned-mesh-fails/1327 "2026-02-03T13:03:38Z")
Nature of bug I am trying the newest development version because i am interested in some of the new features. I ran my simulation case on A100 cards (classical external flow, airfoil section), starting from using p0 to… --- ## [Shape Mismatch in np.linalg.solve in soln-plugin-sampler (sampler.py) Causing ValueError](https://pyfr.discourse.group/t/shape-mismatch-in-np-linalg-solve-in-soln-plugin-sampler-sampler-py-causing-valueerror/1152)
**Author:** [@Debdoot](https://pyfr.discourse.group/u/Debdoot)\ **Replies:** 3\ **Last updated:** [6 September 2024 01:22 UTC](https://pyfr.discourse.group/t/shape-mismatch-in-np-linalg-solve-in-soln-plugin-sampler-sampler-py-causing-valueerror/1152 "2024-09-06T01:22:06Z")
Nature of bug Error in using \[soln-plugin-sampler\] ( associated to sampler.py file) Error print out (if applicable) ValueError: solve: Input operand 1 has a mismatch in its core dimension 0, with gufunc signature (m,m),… --- ## [Expanding 'compute\_entropy' in entropy.mako](https://pyfr.discourse.group/t/expanding-compute-entropy-in-entropy-mako/1086)
**Author:** [@nnunn](https://pyfr.discourse.group/u/nnunn)\ **Replies:** 1\ **Last updated:** [10 May 2024 23:10 UTC](https://pyfr.discourse.group/t/expanding-compute-entropy-in-entropy-mako/1086 "2024-05-10T23:10:09Z")
Nature of bug When ‘shock-capturing’ == ‘entropy-filter’, it looks like e\_func is not defined when expanding the macros for internal and boundary interfaces. So when entropy.mako gets expanded, e\_func is neither ‘numeri… --- ## [Turbulnce plugin hanging. commit bbaaefd](https://pyfr.discourse.group/t/turbulnce-plugin-hanging-commit-bbaaefd/968)
**Author:** [@rubens](https://pyfr.discourse.group/u/rubens)\ **Replies:** 11\ **Last updated:** [2 November 2023 18:58 UTC](https://pyfr.discourse.group/t/turbulnce-plugin-hanging-commit-bbaaefd/968 "2023-11-02T18:58:41Z")
Good morning everyone, I noticed a potential bug from the turbulence plugin: when running a simulation with the turbulence plugin enabled, for a certain amount of time after the start of the simulation, I get no output (… --- ## [PyFR 1.13.0: scotch mesh decomposition error](https://pyfr.discourse.group/t/pyfr-1-13-0-scotch-mesh-decomposition-error/553)
**Author:** [@mlaufer](https://pyfr.discourse.group/u/mlaufer)\ **Replies:** 7\ **Last updated:** [15 February 2022 19:33 UTC](https://pyfr.discourse.group/t/pyfr-1-13-0-scotch-mesh-decomposition-error/553 "2022-02-15T19:33:58Z")
Hi, I am trying to test the Scotch mesh partitioner as a validation step for the PyFR Spack package, but unfortunately I am unable to use Scotch. Is Scotch successfully used by anyone currently? Nature of bug Unable t…