Hi! everyone

I'm making a space scene with planets and I want to apply the textures on them but I receive always the same message:
Unable to load texture.

I'm working on my movie and I have not used Houdini since many weeks and I forgot. I know that I must change something but I don't remember what.

I changed format .jpg for picnc, I have also removed the underscores and it don't work.

What I must do to load the textures ?

Thanks
Bob