# Error message: instability in various nodes

**URL:** <https://community.dlubal.com/t/instabilittat-in-verschiedenen-knoten/4335>\
**Category:** Product Support\
**Tags:** stability-check, rstab-9\
**Created:** [September 10, 2026, 4:23pm UTC](https://community.dlubal.com/t/instabilittat-in-verschiedenen-knoten/4335 "2026-09-10T16:23:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![tozi\_fh](https://community.dlubal.com/letter_avatar_proxy/v4/letter/t/ac8455/32.png) [@tozi\_fh](https://community.dlubal.com/u/tozi_fh)\
**Post date:** [September 10, 2026, 4:23pm UTC](https://community.dlubal.com/t/instabilittat-in-verschiedenen-knoten/4335/1 "2026-09-10T16:23:37Z")

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Hi everyone, we’re fairly new to using RStab and RFEM. I’m uploading a project for you to take a look at. Most of the nodes display an error message: “Free to move in the ... direction.” Unfortunately, we haven’t been able to find a solution to this. Thank you in advance.

Best regards,  
T and C

[Treppe\_Aussichtsplattform.rs9](https://community.dlubal.com/uploads/short-url/upTouBcAnyiedyVyWuA0iFlBxcT.rs9) (1.1 MB)

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**Author:** ![stefan.hoffmann](https://community.dlubal.com/user_avatar/community.dlubal.com/stefan.hoffmann/32/108_2.png) [@stefan.hoffmann](https://community.dlubal.com/u/stefan.hoffmann)\
**Post date:** [September 10, 2026, 4:27pm UTC](https://community.dlubal.com/t/instabilittat-in-verschiedenen-knoten/4335/3 "2026-09-10T16:27:57Z")

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Hi tozi\_fh,

Welcome to the community!

You can find many possible solutions in this FAQ:

[https://www.dlubal.com/de/support-und-schulungen/support/faq/005345](https://www.dlubal.com/de/support-und-schulungen/support/faq/005345)

A little tip: The shape of the unstable model looks like this, and you should bear in mind in RSTAB that members are only connected if they split the member:

[https://www.dlubal.com/de/downloads-und-infos/dokumente/online-handbuecher/rstab-9/003468](https://www.dlubal.com/de/downloads-und-infos/dokumente/online-handbuecher/rstab-9/003468)

 ![image](https://community.dlubal.com/uploads/default/original/2X/b/b701bc3374b36b9de213999631a6ff7c979ac822.png)

Best regards,  
Stefan Hoffmann

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<div class="post-metadata">

**Author:** ![tozi\_fh](https://community.dlubal.com/letter_avatar_proxy/v4/letter/t/ac8455/32.png) [@tozi\_fh](https://community.dlubal.com/u/tozi_fh)\
**Post date:** [September 11, 2026, 6:20am UTC](https://community.dlubal.com/t/instabilittat-in-verschiedenen-knoten/4335/4 "2026-09-11T06:20:48Z")

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Thank you for the helpful assistance! Quick question: how do I set this up so that it looks similar to yours, especially the colors? In my case, only the deformations are displayed, so to speak.

Best regards  
T & C

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<div class="post-metadata">

**Author:** ![stefan.hoffmann](https://community.dlubal.com/user_avatar/community.dlubal.com/stefan.hoffmann/32/108_2.png) [@stefan.hoffmann](https://community.dlubal.com/u/stefan.hoffmann)\
**Post date:** [September 11, 2026, 6:56am UTC](https://community.dlubal.com/t/instabilittat-in-verschiedenen-knoten/4335/5 "2026-09-11T06:56:59Z")

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Hi tozi\_fh,

Thanks for your feedback.

You can control this here:

 ![image](https://community.dlubal.com/uploads/default/original/2X/f/f356ac14ae027fea31330f8bc7aacbd4fcd14361.png)

Best regards,  
Stefan Hoffmann