# Failure to reach convergence

**URL:** <https://forum.itascainternational.com/t/failure-to-reach-convergence/1797>\
**Category:** FLAC3D\
**Created:** [November 11, 2024, 7:57pm UTC](https://forum.itascainternational.com/t/failure-to-reach-convergence/1797 "2024-11-11T19:57:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RockEugieK](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/rockeugiek/32/212_2.png) [@RockEugieK](https://forum.itascainternational.com/u/RockEugieK)\
**Post date:** [November 11, 2024, 7:57pm UTC](https://forum.itascainternational.com/t/failure-to-reach-convergence/1797/1 "2024-11-11T19:57:54Z")

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Hi Itascans and Itasca users,  
My model is failing to reach convergence, running it for the past 24 hours, what’s the solution to this ?

Thanks.

 ![ITASCA](https://canada1.discourse-cdn.com/flex031/uploads/itasca/original/2X/4/43b9c82a237ce3d9ec11a5a084baef680c28b99e.jpeg)

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**Author:** ![dblanksma](https://avatars.discourse-cdn.com/v4/letter/d/858c86/32.png) [@dblanksma](https://forum.itascainternational.com/u/dblanksma)\
**Post date:** [November 11, 2024, 8:05pm UTC](https://forum.itascainternational.com/t/failure-to-reach-convergence/1797/2 "2024-11-11T20:05:37Z")

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Hello @RockEugieK,

It could be any number of things. I’d suggest making a plot contour of zone convergence. This will show where in the model it’s struggling to converge and possibly give you a hint as the problem.

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<div class="post-metadata">

**Author:** ![RockEugieK](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/rockeugiek/32/212_2.png) [@RockEugieK](https://forum.itascainternational.com/u/RockEugieK)\
**Post date:** [March 15, 2025, 11:23pm UTC](https://forum.itascainternational.com/t/failure-to-reach-convergence/1797/3 "2025-03-15T23:23:00Z")

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okay copy that. thank you