"another dir\some file.txt" 

Test: Should complain that the relative directory does not exist.
+Backup directory '.*[/\\]another dir[/\\]backup[/\\]\?' does not exist!+

+"E:[\\/]temp[\\/]WriteBackupTest[\\/]another dir[\\/]new file" +

Test: Should complain that the relative directory does not exist.
+Backup directory '.*[/\\]another dir[/\\]backup[/\\]\?' does not exist!+

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