# Processing 4.3 cannot read GPIO on Raspberry Pi 400

**URL:** https://discourse.processing.org/t/processing-4-3-cannot-read-gpio-on-raspberry-pi-400/44661
**Category:** Processing for Pi
**Created:** [June 30, 2024, 8:47am UTC](https://discourse.processing.org/t/processing-4-3-cannot-read-gpio-on-raspberry-pi-400/44661 "2024-06-30T08:47:23Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![rvirmoors](https://avatars.discourse-cdn.com/v4/letter/r/c6cbf5/32.png) [@rvirmoors](https://discourse.processing.org/u/rvirmoors)
#### Post date: [June 30, 2024, 8:47am UTC](https://discourse.processing.org/t/processing-4-3-cannot-read-gpio-on-raspberry-pi-400/44661/1 "2024-06-30T08:47:23Z")

</div>

I’m trying to run the SimpleInput sketch and am getting this error:

```auto
GPIO pin 4 does not seem to be available on your platform
RuntimeException: /sys/class/gpio/export: Invalid argument
RuntimeException: /sys/class/gpio/export: Invalid argument

```

accessing the same pin from a basic gpiozero program works fine, so it’s not an issue with the wiring

my system is fully up to date. Any clue what might be causing this?