# Computation of your model failed

**URL:** <https://discourse.mcneel.com/t/computation-of-your-model-failed/117645>\
**Category:** ShapeDiver\
**Tags:** windows\
**Created:** [February 2, 2021, 2:04pm UTC](https://discourse.mcneel.com/t/computation-of-your-model-failed/117645 "2021-02-02T14:04:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![oliver.viberg](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/oliver.viberg/32/280593_2.png) [@oliver.viberg](https://discourse.mcneel.com/u/oliver.viberg)\
**Post date:** [February 2, 2021, 2:04pm UTC](https://discourse.mcneel.com/t/computation-of-your-model-failed/117645/1 "2021-02-02T14:04:47Z")

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Hi!

I’m having issues uploading my GH file. The file has been uploaded before without issues, but now it fails. I have reverted the file to where I know it uploaded without issues, but it still does not work.

I would appreciate if someone could find out what’s wrong.

(Ref: ca4c4022-3987-475e-93ec-453a1b2d3d9c)

[SD\_Excavator\_Big\_v003.gh](https://discourse.mcneel.com/uploads/short-url/4o1Stt0BNXgDQcPHRdE0geKtZIf.gh) (3.7 MB)

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<div class="post-metadata">

**Author:** ![pavol](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pavol/32/206581_2.png) [@pavol](https://discourse.mcneel.com/u/pavol)\
**Post date:** [February 2, 2021, 2:36pm UTC](https://discourse.mcneel.com/t/computation-of-your-model-failed/117645/2 "2021-02-02T14:36:24Z")

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One of the internalised meshes in your definition is too large.

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/9/e/3/9e3c97708191f194071a537d5a91c871d1d0275b.png)

> [@Problem reference: 6185eb8d-797e-4c15-9a20-8d7ebe6490d0](https://discourse.mcneel.com/t/problem-reference-6185eb8d-797e-4c15-9a20-8d7ebe6490d0/103709/2):
>
> At the moment, all meshes bigger than 65536 vertices have to be reduced before sending results to the viewer, and the operation usually takes a while and sometimes seems to fail.

I suggest to divide your model into smaller manageable parts or reduce mesh sizes.

> [@Reduce a mesh size](https://discourse.mcneel.com/t/reduce-a-mesh-size/108764/4):
>
> Rhino command _ReduceMesh_ does a really good job in reducing size while keeping the shape acceptable so optimise the meshes before you internalise or import them to Grasshopper.

You can read more about output limits in this documentation article:

[https://support.shapediver.com/hc/en-us/articles/360009130740-Limitations-regarding-definition-outputs](https://support.shapediver.com/hc/en-us/articles/360009130740-Limitations-regarding-definition-outputs)

Various optimisation techniques are covered in following video tutorials:

[![](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/6/9/3/693c2139c8ac855203bc309e23d76f1d5eb2d289.jpeg "Optimizing Rhino Grasshopper Definitions | Pt. 2: B-Reps vs Meshes") ](https://www.youtube.com/watch?v=J9brpIf6Qyg&t=455s)

https://www.youtube.com/embed/zhBbRPkOjA0?feature=oembed&wmode=opaque&list=PLxoa_kZeM-7yKEgSIo_Q3wzfYhoAqxU8c&start=1525