# P3D not running in python mode
**URL:** https://discourse.processing.org/t/p3d-not-running-in-python-mode/39282
**Category:** Processing.py
**Created:** [October 15, 2022, 9:49am UTC](https://discourse.processing.org/t/p3d-not-running-in-python-mode/39282 "2022-10-15T09:49:11Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Ishy](https://discourse.processing.org/u/Ishy)
#### Post date: [October 15, 2022, 9:49am UTC](https://discourse.processing.org/t/p3d-not-running-in-python-mode/39282/1 "2022-10-15T09:49:11Z")
hi, i just started out using processing and i quickly discovered that P3D doesn’t work.
my code is:
```auto
def setup():
size(200, 200, P3D)
```
when i click run it just doesnt do anything and stops quickly after (0.5-1 secounds after i click run)
can someone tell me what im doing wrong?
---
### Author:  [@tabreturn](https://discourse.processing.org/u/tabreturn)
#### Post date: [October 15, 2022, 11:09am UTC](https://discourse.processing.org/t/p3d-not-running-in-python-mode/39282/2 "2022-10-15T11:09:06Z")
Welcome @Ishy
Are you using Processing 4.x or Processing 3.5.4? What are your system details? (Mac/Windows/Linux)
---
### Author:  [@Ishy](https://discourse.processing.org/u/Ishy)
#### Post date: [October 15, 2022, 11:14am UTC](https://discourse.processing.org/t/p3d-not-running-in-python-mode/39282/3 "2022-10-15T11:14:25Z")
im using processing 4.0.1 on windows 10
---
### Author:  [@tabreturn](https://discourse.processing.org/u/tabreturn)
#### Post date: [October 15, 2022, 11:27am UTC](https://discourse.processing.org/t/p3d-not-running-in-python-mode/39282/4 "2022-10-15T11:27:13Z")
Probably better to run Processing 3.5.4 for Python Mode.