{Initial_extruder} doesn't work in file names #633

New Issue

MrUnknownDE · 2026-04-05T16:24:33+02:00

MrUnknownDE commented

2026-04-05 16:24:33 +02:00

Originally created by @Wegerich on 2/23/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.20-beta2 7e63fce7

Operating System (OS)

Windows

OS Version

Win 11

Additional system information

No response

Printer

MK4S with mmu3

How to reproduce

Load a model
1. Go to the "others" tab of the print settings
Enter the following in the filename format {timestamp}-{input_filename_base}_{nozzle_diameter[initial_extruder]}n_{layer_height}mm_{filament_type[initial_tool]}_{printer_model}_{print_time}.gcode
Slice the model

Actual results

The model will not slice and an error is shown:

Expected results

These two commands should have the same function if I understand correctly?

Project file & Debug log uploads

1 Prusa MK4S 0.4 nozzle - Firmware retraction 2026-02-23.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @Wegerich on 2/23/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.20-beta2 7e63fce7 ### Operating System (OS) Windows ### OS Version Win 11 ### Additional system information _No response_ ### Printer MK4S with mmu3 ### How to reproduce 1. Load a model 2. 1. Go to the "others" tab of the print settings 3. Enter the following in the filename format `{timestamp}-{input_filename_base}_{nozzle_diameter[initial_extruder]}n_{layer_height}mm_{filament_type[initial_tool]}_{printer_model}_{print_time}.gcode` 4. Slice the model ### Actual results The model will not slice and an error is shown: <img width="907" height="507" alt="Image" src="https://github.com/user-attachments/assets/93b6a313-c258-49e5-b8e5-fe9ce617adbf" /> ### Expected results These two commands should have the same function if I understand correctly? <img width="624" height="671" alt="Image" src="https://github.com/user-attachments/assets/beabe81c-d0d2-493b-8a4d-255029a1c82a" /> <img width="616" height="549" alt="Image" src="https://github.com/user-attachments/assets/2891a9f2-c144-4b06-8aa0-b914b3e3c585" /> ### Project file & Debug log uploads [1 Prusa MK4S 0.4 nozzle - Firmware retraction 2026-02-23.zip](https://github.com/user-attachments/files/25477934/1.Prusa.MK4S.0.4.nozzle.-.Firmware.retraction.2026-02-23.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#633