# Phantom 4 multispectral \_ multiple troubles

**URL:** <https://community.pix4d.com/t/phantom-4-multispectral-multiple-troubles/21331>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [February 7, 2022, 11:17am UTC](https://community.pix4d.com/t/phantom-4-multispectral-multiple-troubles/21331 "2022-02-07T11:17:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hugues\_calderero](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/hugues_calderero/32/206_2.png) [@hugues\_calderero](https://community.pix4d.com/u/hugues_calderero)\
**Post date:** [February 7, 2022, 11:17am UTC](https://community.pix4d.com/t/phantom-4-multispectral-multiple-troubles/21331/1 "2022-02-07T11:17:13Z")

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Hi everyone,  
i am facing multiple troubles while i am processing data from a P4M. (with the last firmware)  
here are the issus :

1st step :  
1/ warning: no path from reference camera …  
this issu is for all images .tiff  
(maybe it is because I separated jpg and tiff in 2 differents files. i don’t know…)

2/ [Error]: [BundleAdjuster][minimize] no projections errors ! aborting.  
I read some topics about that issue but i don’t underdstand  
In the quality report, there is no area covered calculated. is it due to this issue?  
Iam connected to a base GPS and RTK is fixed

3rd step :  
3/[Warning]: Warning w9020: GDAL Error \<1\> TIFFOpen:C:/Users/GEOCAPTURE/Documents/pix4d/p4test/expé P4M/4\_index/project\_data/reflectance\_gsd/tiles/expé P4M\_transparent\_reflectance\_blue\_1\_1.tif: No such file or directory  
[Warning]: Warning w9020: GDAL Error \<1\> TIFFOpen:C:/Users/GEOCAPTURE/Documents/pix4d/p4test/expé P4M/4\_index/project\_data/reflectance\_gsd/tiles/expé P4M\_transparent\_reflectance\_blue\_1\_1.tif: No such file or directory  
[Error]: Unable to write PICs version tag: Unable to open C:/Users/GEOCAPTURE/Documents/pix4d/p4test/expé P4M/4\_index/project\_data/reflectance\_gsd/tiles/expé P4M\_transparent\_reflectance\_blue\_1\_1.tif!

this issu is for each band

i used original template from pix4D AG MULTISPECTRAL without any modification.  
pix4D 4.5.6  
data was acquired with a manual flight and i already know that my overlap was too small

I need some helps to understand all that issus and to resolve it.

thank you  
Hugues

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**Author:** ![Daniele\_Lecci](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/daniele_lecci/32/9493_2.png) [@Daniele\_Lecci](https://community.pix4d.com/u/Daniele_Lecci)\
**Post date:** [February 7, 2022, 2:46pm UTC](https://community.pix4d.com/t/phantom-4-multispectral-multiple-troubles/21331/2 "2022-02-07T14:46:47Z")

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Hi @hugues_calderero,

Thank you for your message.

1/  
This could be an issue if you moved the files after you created the project.  
Please create the project again and start processing without moving the images

2/ and 3/  
Please note that, for a better reconstruction of the captured scene in a thermal project, some recommendations should be followed during the image acquisition:

- Have very high overlap: **90% front** and **side** image overlap.
- The images have been taken at a **resolution** of **at least 640x480**.
- The images **do not suffer from motion blur**. An increased flight speed may cause a blurred image. **strong text**

If your front and side overlap is smaller that 90%, please acquire the dataset again.

For more information about processing a thermal dataset, please read the following article:

> **[Processing thermal images](https://support.pix4d.com/hc/en-us/articles/360000173463-Processing-thermal-images)**
>
> IN THIS ARTICLE
> Introduction to thermal mapping Which images can be used for thermal projects? Which Pix4D software can process thermal images? Which thermal cameras are supported and which tempera...

Cheers,  
Daniele