# Dynamic Analysis - "out of memory in 3DEC"

**URL:** <https://forum.itascainternational.com/t/dynamic-analysis-out-of-memory-in-3dec/200>\
**Category:** 3DEC\
**Created:** [February 4, 2022, 3:01pm UTC](https://forum.itascainternational.com/t/dynamic-analysis-out-of-memory-in-3dec/200 "2022-02-04T15:01:57Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jhazzard](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@jhazzard](https://forum.itascainternational.com/u/jhazzard)\
**Post date:** [February 4, 2022, 5:37pm UTC](https://forum.itascainternational.com/t/dynamic-analysis-out-of-memory-in-3dec/200/2 "2022-02-04T17:37:20Z")

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3DEC doesn’t dynamically allocate memory. So you need to tell it how much memory your model will use before you run the model. Go to Tools - Options - Configuration - and increase the Main Array Size. This is the memory in MB. So if you enter 6000 then you are setting aside 6 GB of memory for 3DEC.

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