# What are the best way to get error estimates from a PDE solver?

**URL:** https://community.freefem.org/t/what-are-the-best-way-to-get-error-estimates-from-a-pde-solver/1086
**Category:** General Discussion
**Created:** [July 6, 2021, 6:03pm UTC](https://community.freefem.org/t/what-are-the-best-way-to-get-error-estimates-from-a-pde-solver/1086 "2021-07-06T18:03:39Z")
**Posts on this page:** 1
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### Author: ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)
#### Post date: [July 14, 2021, 11:04am UTC](https://community.freefem.org/t/what-are-the-best-way-to-get-error-estimates-from-a-pde-solver/1086/7 "2021-07-14T11:04:54Z")

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There is not interface to `EPSComputeError` in the SLEPc plugin. You can use the options I gave in the earlier post in the `sparams` argument of your `EPSSolve`. If you want to store the errors in a file instead of being printed to screen, you should be able to do `-eps_error_relative your_filename::ascii_info_detail`.

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