# RBE3 implementation

**URL:** <https://prepomax.discourse.group/t/rbe3-implementation/3596>\
**Category:** General Questions\
**Created:** [August 7, 2026, 1:07pm UTC](https://prepomax.discourse.group/t/rbe3-implementation/3596 "2026-08-07T13:07:19Z")\
**Posts on this page:** 1\
**Showing post:** 25

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**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\
**Post date:** [August 11, 2026, 12:13pm UTC](https://prepomax.discourse.group/t/rbe3-implementation/3596/25 "2026-08-11T12:13:32Z")

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Both types of distributing couplings have some limitations in terms of what can be applied and to which DOFs

 ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/91c5ea0437faa74bab6169b80c0061f38afc09fb.png)

> **[Different coupling constraints and their limitations](https://calculix.discourse.group/t/different-coupling-constraints-and-their-limitations/2586/3)**
>
> Just adding a short summary of the most important aspect (what can be applied to the reference node):

So it would be good to have a switch in PrePoMax.

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