Orca: “Invalid values found in the 3mf” error
This message means a setting inside the 3MF is outside the range Orca accepts. The most common cause is the 0 and -1 values that mean “auto” or “default” in Bambu Studio files.
Why does it happen?
- Bambu Studio uses 0 or -1 as “auto” for some settings; Orca expects a valid range for these fields and rejects the value.
- Common examples: wall, sparse infill and solid infill filament numbers (at least 1 instead of 0), raft first-layer expansion, tree support wall count and wipe tower brim width (0 or a positive value instead of -1).
- Because the file’s author saved it with their Bambu Studio version, the same model can raise this error in other files too.
How to fix it
- Give the file to the converter: values Orca would reject are corrected automatically and each one is listed in the report under the “values Orca would reject were corrected” section.
- To fix it by hand, open the file in Orca as “geometry only” and choose the settings yourself; in that case the settings in the file are not loaded.
- Open the converted file in Orca and check the preview.
Frequently asked questions
Which values are corrected?
Wall, sparse infill and solid infill filament numbers that are 0 become 1, a raft first-layer expansion of -1 becomes 2, a tree support wall count of -1 becomes 0 and a wipe tower brim width of -1 becomes 3 mm; negative values in the same family are set to 0.
Does the correction change the design of the file?
In Bambu these values already mean “auto”; the correction writes the equivalent Orca accepts. Quality settings such as layer height, wall count and infill do not change.