What we tested
| File | PrusaSlicer said | Actual problem | Result |
|---|---|---|---|
| 0.1 mm cube | No extrusions were generated for objects. | Clean solid, 0.1 mm across | Not sliced |
| 0.1 mm cube, sequential printing off | The print is empty. … | Clean solid, 0.1 mm across | Not sliced |
| 0.3 mm cube | No error | Clean solid, 0.3 mm across | Sliced, 2 layers |
| 1 mm cube | Detected print stability issues: … Low bed adhesion … | Clean solid | Sliced, 5 layers |
| 40 × 20 mm wall, 0.2 mm thick | No error | Clean solid, half a line thick | Sliced, 100 layers |
| 40 × 20 × 12 mm block | No error | Clean solid | Sliced, 60 layers |
What is going on
With Complete individual objects on, PrusaSlicer skips the check behind "The print is empty" (source) and stops later, when G-code export finds no object with anything to extrude (source). The cause is the same: the part is too small for the nozzle and layer height. Turning sequential printing off only changes the message: the 0.1 mm cube then stopped with "The print is empty".
FixSTL reported every part here as a clean solid and showed its size; it does not scale parts.
What was actually wrong
How to fix it
- Check the object's size in PrusaSlicer: a part a fraction of a millimetre across may have nothing to print.
- If the part was scaled down or exported in the wrong unit, scale it back up and slice again.
- Make very small parts larger in your modelling program, or leave them out of the print.
- Turning off Complete individual objects (Print Settings > Output options) does not help a part this small: PrusaSlicer then reports "The print is empty".
- Check the file in FixSTL: it shows the part's size, but it does not scale parts.
Source: Seen in our tests · PrusaSlicer 2.9.6 on macOS