Illustrator.Application.ActiveDocument.fullName.modifed return null on MAC

[Robin5EB2]

the last modifed date works fine on windows, however, on MAC, the activeDocument.fullName.modified return null, the fsName is correct, and also the file was exists on the disk, any ideas? Thanks!

[Robin5EB2]

any one can help? the activeDocument.fullName.modified works fine on windows, but return null on MAC, thanks so much!

[Robin5EB2]

Since this only happen on MAC, is this an illustrator API bug or some libs that we linked are incorrect versions?  we may need a quick fix for this, Thanks so much!