MultiFileImport (MFI())
independent of the settings in the operating system and the settings in the preferences,
text files with point as decimal separator can be imported, files with comma can't.
Open(...)
there are several settings in JMP that control whether txt files can be imported or not.
This is how it looks on my Win / JMP18.1.1 system:
(to make it easier to read I put the symbols for comma and point on top of each other)
Some findings: