# \#opencl

**URL:** https://pyfr.discourse.group/tag/opencl/16.md

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## [PyFR 1.12.1 Producing NaNs with 2D Incompressible Cylinder Example](https://pyfr.discourse.group/t/pyfr-1-12-1-producing-nans-with-2d-incompressible-cylinder-example/426)

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**Author:** [@Zach-Davis](https://pyfr.discourse.group/u/Zach-Davis)\
**Replies:** 6\
**Last updated:** [4 July 2021 23:16 UTC](https://pyfr.discourse.group/t/pyfr-1-12-1-producing-nans-with-2d-incompressible-cylinder-example/426 "2021-07-04T23:16:53Z")

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I was revisiting PyFR to familiarize myself with what’s changed, and I started with trying to re-run the incompressible 2d cylinder case. However, I’m finding that the incompressible 2-D cylinder example in the examples…