# Calibration Stuck at 27%

**URL:** https://community.pix4d.com/t/calibration-stuck-at-27/30996
**Category:** General Ag Questions/Troubleshooting
**Created:** [August 21, 2024, 8:55am UTC](https://community.pix4d.com/t/calibration-stuck-at-27/30996 "2024-08-21T08:55:22Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![asli](https://avatars.discourse-cdn.com/v4/letter/a/a8b319/32.png) [@asli](https://community.pix4d.com/u/asli)
#### Post date: [August 21, 2024, 8:55am UTC](https://community.pix4d.com/t/calibration-stuck-at-27/30996/1 "2024-08-21T08:55:22Z")

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Drone image calibrations stuck at 27%. This happened 3 times. They are different images from different flights. Some flights process without a problem some of them do not. And it doesn’t give any errors or notifications about the problem.

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### Author: ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)
#### Post date: [August 21, 2024, 9:48am UTC](https://community.pix4d.com/t/calibration-stuck-at-27/30996/2 "2024-08-21T09:48:43Z")

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HI asli,

Will reply in the private support ticket, let’s update this post when we have more information

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### Author: ![emory.wellman](https://avatars.discourse-cdn.com/v4/letter/e/d26b3c/32.png) [@emory.wellman](https://community.pix4d.com/u/emory.wellman)
#### Post date: [November 13, 2024, 8:54pm UTC](https://community.pix4d.com/t/calibration-stuck-at-27/30996/3 "2024-11-13T20:54:44Z")

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I came to this forum looking for a solution to the exact same issue. I calibrated my images, marked 3 GCPs, and selected Calibration again…each time it stalls at 28% and I have to cancel processing. I have also noticed that Reoptimization is greyed out - perhaps this is related? Thank you!

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### Author: ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)
#### Post date: [November 14, 2024, 3:05pm UTC](https://community.pix4d.com/t/calibration-stuck-at-27/30996/4 "2024-11-14T15:05:10Z")

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Hi,

I assume you are referring to PIX4Dmapper? please share the Quality report if any, and the log files.  
Best

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### Author: ![emory.wellman](https://avatars.discourse-cdn.com/v4/letter/e/d26b3c/32.png) [@emory.wellman](https://community.pix4d.com/u/emory.wellman)
#### Post date: [November 15, 2024, 8:01pm UTC](https://community.pix4d.com/t/calibration-stuck-at-27/30996/5 "2024-11-15T20:01:58Z")

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Hello Jose, I fixed the issue! I had incorrectly marked one of my GCPs and once I remedied that the calibration finished.