# FLAC3D crashes while running this script

**URL:** <https://forum.itascainternational.com/t/flac3d-crashes-while-running-this-script/2167>\
**Category:** FLAC3D\
**Tags:** fish, flac3d\
**Created:** [July 15, 2025, 8:30pm UTC](https://forum.itascainternational.com/t/flac3d-crashes-while-running-this-script/2167 "2025-07-15T20:30:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![roozbeh](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/roozbeh/32/126_2.png) [@roozbeh](https://forum.itascainternational.com/u/roozbeh)\
**Post date:** [July 15, 2025, 8:30pm UTC](https://forum.itascainternational.com/t/flac3d-crashes-while-running-this-script/2167/1 "2025-07-15T20:30:44Z")

</div>

Hi

The goal of this model is to calculate settlement resulting from water table drawdown. I based it on the “One-Dimensional Consolidation Considering Secondary Compression” example from the manual, with a simple modification: I lowered the water table every 500 cycles.

Unfortunately, the program freezes around cycle 9829 without displaying any error message or warning.

Could you please take a look at the model and help identify the issue?

The script for this model is attached to this message, and for reference, I’m using FLAC3D Version 7.00.156.

Thank you!

-Roozbeh  
[settlement\_crashes.dat](https://forum.itascainternational.com/uploads/short-url/sec18vx1dnlvuyNGrwzPStYekQT.dat) (8.3 KB)  
[helper\_functions.fis](https://forum.itascainternational.com/uploads/short-url/hqy0usqVTEwroDBLGwGXsZQlqPN.fis) (857 Bytes)