Separate names with a comma.
(adding to earlier issue) The error is fundamentally because MS-Windows defines the top-most area "available" but macOS defines the same area...
This is still an issue in Parallels Desktop 16.1.0 (48950) Pro, "Coherence" mode. The Windows title bar is hidden behind the OS X menu bar. [ATTACH]
2018-03-04 Parallels 12 on MacOS 10.13.3, Windows 10 version 1709. Could not scroll horizontally in a specific application: MYOB accountright...