# Adaptive error indicator

**URL:** <https://community.freefem.org/t/adaptive-error-indicator/410>\
**Category:** General Discussion\
**Created:** [May 13, 2020, 11:32pm UTC](https://community.freefem.org/t/adaptive-error-indicator/410 "2020-05-13T23:32:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![shymath126.com](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@shymath126.com](https://community.freefem.org/u/shymath126.com)\
**Post date:** [May 13, 2020, 11:32pm UTC](https://community.freefem.org/t/adaptive-error-indicator/410/1 "2020-05-13T23:32:09Z")

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Hi, every one!  
I am trying to implement the right code which is about an adaptive error indicator, it works very well with the old version, i.e., 2.19, but the results were computed by the latest version is weird, I don’t know the reason, I need your help to fix it.

Thank you!