Hello,
Thank you for your help. I indeed made a mistake, I wanted to know what the WARNINGS mean, not the errors. Does it mean that the coregistration might be incorrect? Is the code available in free access somewhere so I can find what the origin of this warning is?
Concerning the GDAL environment, I saw on the following post that I don’t need it unless I want to use GDAL readers/writers, so I did not set it.