# Warning w9020:  GDAL error \<4\>

**URL:** <https://community.pix4d.com/t/warning-w9020-gdal-error-4/4009>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [September 13, 2017, 9:11am UTC](https://community.pix4d.com/t/warning-w9020-gdal-error-4/4009 "2017-09-13T09:11:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Moselilnna\_Trevot](https://avatars.discourse-cdn.com/v4/letter/m/e480ec/32.png) [@Moselilnna\_Trevot](https://community.pix4d.com/u/Moselilnna_Trevot)\
**Post date:** [September 13, 2017, 9:11am UTC](https://community.pix4d.com/t/warning-w9020-gdal-error-4/4009/1 "2017-09-13T09:11:13Z")

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Hi,

&nbsp;

After completing processing completely, I cant seem to access my mosaic editor and load the created tiff. I know it exists as I can open it in my image program but cant seem to access in Pix4D.

&nbsp;

When viewing the log, there are a lot of warnings as below:

[Warning]: Warning w9020: GDAL error \<4\> `L:/Aerial Photogrammetry/Strathneath 170910/temp/3\_dsm\_ortho/1\_dsm/tiles/temp\_dsm.tif’ does not exist in the file system,

```
[Warning]: and is not recognized as a supported dataset name.

What am I doing wrong??

```

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<div class="post-metadata">

**Author:** ![Selim\_Erguden](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/selim_erguden/32/337_2.png) [@Selim\_Erguden](https://community.pix4d.com/u/Selim_Erguden)\
**Post date:** [September 13, 2017, 1:12pm UTC](https://community.pix4d.com/t/warning-w9020-gdal-error-4/4009/2 "2017-09-13T13:12:44Z")

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Hey Moselilnna,

Is your Mosaic Editor Greyed out ? You can only use the Mosaic Editor if your Raster DSM (GEOTIFF) is checked. It would be under Step 3 DSM, Orthomosaic and Index/DSM and Orthomosaic. Moreover you can only use the Mosaic Editor with the RGB projects. Even with those warnings you should still have a DSM output if your DSM is checked.

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**Author:** ![SHERA\_MARIE\_SERAD](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SHERA\_MARIE\_SERAD](https://community.pix4d.com/u/SHERA_MARIE_SERAD)\
**Post date:** [October 10, 2017, 3:40am UTC](https://community.pix4d.com/t/warning-w9020-gdal-error-4/4009/3 "2017-10-10T03:40:09Z")

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&nbsp;@Moselilnna, hello to you!&nbsp;

&nbsp;

Is this problem solved already? Would you be kind to share it with me? I’m having the same trouble in my processing and currently searching for a solution.&nbsp;

I would appreciate your comment on this!

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