It fails because you launch ryzom_installer in D:/ryzom, so it tries to install himself, and can't copy over the ryzom_installer.exe in D:/ryzom cause it's used (by himself)
Remove all files in D:/ryzom, put ryzom_installer anywhere NOT in D:/ryzom, launch it and chose D:/ryzom as installation path.
Remove all files in D:/ryzom, put ryzom_installer anywhere NOT in D:/ryzom, launch it and chose D:/ryzom as installation path.
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