"Prime tower is only supported" erro despite not changing layer heights #1358

New Issue

MrUnknownDE · 2026-04-05T17:26:33+02:00

MrUnknownDE commented

2026-04-05 17:26:33 +02:00

Originally created by @johnny-bit on 12/14/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1

Operating System (OS)

Windows

OS Version

Windows 11

Additional system information

Irrelevant

Printer

All

How to reproduce

Adding a height range modifier to at least 2 objects on plate, just to change the color at layer (the same height) causes following error to appear:

Actual results

When slicing, the plates with height range modifiers changing colors show error: "The prime tower is only supported if all object have the same variable layer height.

Expected results

This bug is not present in bambu studio, it is present in multiple orca descendanta.

Project file & Debug log uploads

OrcaBUG.zip

Checklist of files to include

Log file
Project file

Anything else?

The issue was mentioned by @mrhasbean here: https://github.com/OrcaSlicer/OrcaSlicer/issues/5034#issuecomment-2170984242

*Originally created by @johnny-bit on 12/14/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1 ### Operating System (OS) Windows ### OS Version Windows 11 ### Additional system information Irrelevant ### Printer All ### How to reproduce Adding a height range modifier to at least 2 objects on plate, just to change the color at layer (the same height) causes following error to appear: <img width="1421" height="627" alt="Image" src="https://github.com/user-attachments/assets/679be96c-1528-4886-a2ae-27855d2f479b" /> ### Actual results When slicing, the plates with height range modifiers changing colors show error: "The prime tower is only supported if all object have the same variable layer height. ### Expected results This bug is not present in bambu studio, it is present in multiple orca descendanta. ### Project file & Debug log uploads [OrcaBUG.zip](https://github.com/user-attachments/files/24152402/OrcaBUG.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? The issue was mentioned by @mrhasbean here: https://github.com/OrcaSlicer/OrcaSlicer/issues/5034#issuecomment-2170984242

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Reference: github/OrcaSlicer#1358