# Assertion fail: (nbdeja\<100)

**URL:** https://community.freefem.org/t/assertion-fail-nbdeja-100/1088
**Category:** General Discussion
**Created:** [July 6, 2021, 10:14pm UTC](https://community.freefem.org/t/assertion-fail-nbdeja-100/1088 "2021-07-06T22:14:25Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Daokun](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/daokun/32/522_2.png) [@Daokun](https://community.freefem.org/u/Daokun)
#### Post date: [July 6, 2021, 10:14pm UTC](https://community.freefem.org/t/assertion-fail-nbdeja-100/1088/1 "2021-07-06T22:14:25Z")

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Hi guys,

My codes worked fine last week. suddenly, an error notification called  
“assertion fail: (nbdeja\<100)  
line 831: in file …/femlib/GQuadTree.cpp”

occurrs this week with same codes. Does anyone knows what this means and how to solve this problem?

Thank you in advance!

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<div class="post-metadata">

### Author: ![frederichecht](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/frederichecht/32/15_2.png) [@frederichecht](https://community.freefem.org/u/frederichecht)
#### Post date: [July 8, 2021, 8:17am UTC](https://community.freefem.org/t/assertion-fail-nbdeja-100/1088/2 "2021-07-08T08:17:59Z")

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Can you send the data of mesh , to reproduce the problem.