# Uploading Model and Defining Boundary Conditions

**URL:** <https://www.simscale.com/forum/t/uploading-model-and-defining-boundary-conditions/82592>\
**Category:** Project Support\
**Created:** [June 2, 2018, 2:29pm UTC](https://www.simscale.com/forum/t/uploading-model-and-defining-boundary-conditions/82592 "2018-06-02T14:29:15Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jousefm](https://www.simscale.com/forum/user_avatar/www.simscale.com/jousefm/32/34908_2.png) [@jousefm](https://www.simscale.com/forum/u/jousefm)\
**Post date:** [June 2, 2018, 5:15pm UTC](https://www.simscale.com/forum/t/uploading-model-and-defining-boundary-conditions/82592/2 "2018-06-02T17:15:42Z")

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Hi @nsetty!

How did you define the Rollers? It seems that they are defined improperly and are somehow connected to the rear face of your geometry. Did you model the holes by creating a solid and then extruding 3 holes? If not then try this approach and see if that changes the issue.

Our PowerUser @BenLewis posted an excellent answer about short edges here: **[Split Periodic Faces](https://www.simscale.com/forum/t/meshing-tip-split-periodic-faces/108)** - maybe this can solve the problem.

* * *

Can you test it and get back to me? Maybe the other [@power\_users](https://www.simscale.com/forum/groups/power_users) have a nice tip for you here.

Cheers!

Jousef

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