# Troubleshooting Guides

**URL:** https://forum.ubiquityrobotics.com/c/troubleshooting-guides/6.md

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## [About the Troubleshooting Guides category](https://forum.ubiquityrobotics.com/t/about-the-troubleshooting-guides-category/141)

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**Author:** [@rohbotics](https://forum.ubiquityrobotics.com/u/rohbotics)\
**Replies:** 0

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This is the place to go to find guides on troubleshooting issues on your robot.

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## [Troubleshooting procedure for fiducial localization problems](https://forum.ubiquityrobotics.com/t/troubleshooting-procedure-for-fiducial-localization-problems/134)

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**Author:** [@davecrawley](https://forum.ubiquityrobotics.com/u/davecrawley)\
**Replies:** 3\
**Last updated:** [September 1, 2018, 11:15pm UTC](https://forum.ubiquityrobotics.com/t/troubleshooting-procedure-for-fiducial-localization-problems/134 "2018-09-01T23:15:29Z")

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Check the fiducial is the correct size the thick dark square that is the exterior of the dark parts of the fiducial should be exactly 14.0 cm along each edge. Make sure that there is a white border around the big bl…