Hi Amine,

I think you have made in error in pasting code into the GitHub issue. The code you've given will fail at dataset = memfile.open because you haven't assigned memfile yet.

The message you see printed comes straight from the GDAL library. You haven't configured any GDAL error or log message handler and so the messages go directly to your terminal. Message handlers are configured if you run your code within a `with rasterio.Env()` block.

    import rasterio

    with rasterio.Env():

        # your code here

Also if you do

    with memfile.open(...) as dataset:

you won't see this message.