Exporting M4 file as an .xml file and Bar Properties
Create file in format SATB plus piano in 4/4 music tempo with notes in each stave
Export as .xml file
Open .xml file (it defaults to M3)
Note the bar properties have not exported correctly. Bars with 4/4 tempo now have a grayed out + sign in each bar indicating Bar Properties have changed and are now 8/4 or something else other than 4/4 .
Accessing Bar Properties to correct the tempo in each bar erases the notes in the piano bass clef stave.