# Simulation error - please help

**URL:** <https://forum.xod.io/t/simulation-error-please-help/3911>\
**Category:** XOD Programming Questions\
**Created:** [May 6, 2020, 8:24am UTC](https://forum.xod.io/t/simulation-error-please-help/3911 "2020-05-06T08:24:17Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![gweimer](https://avatars.discourse-cdn.com/v4/letter/g/a9adbd/32.png) [@gweimer](https://forum.xod.io/u/gweimer)\
**Post date:** [May 6, 2020, 12:46pm UTC](https://forum.xod.io/t/simulation-error-please-help/3911/4 "2020-05-06T12:46:01Z")

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You can’t simulate extra hardware like buttons, LCD, LED, or sensors. These need replaced with tweak or watch nodes or run on actual hardware. You can use debug when running on hardware to combine tweak/watch nodes with extra hardware.

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