A scenario failing past its opening popped the loader mode and went on to pop it again and push the driver mode with the scenery half loaded; it goes back to the launcher as one that can't be opened. FileCased() goes through the folder only where the file system tells the case apart: on Windows a missing file was looked for in its whole folder for nothing, and a name outside the code page threw from the parser. The Discord thread sleeps a quarter of a second outside the driver mode, not to hold the closing up.
The command line gives the name of the scenery lowercased, and the sceneries made on Windows name their files and includes in any case: on a case-sensitive filesystem they weren't found. FileCased() finds the file whose name differs only in case; the parser and the scenario loader use it. A scenario that can't be opened logs the reason and goes back to the launcher instead of ending with an exception.
