libreoffice will not run after CronTab starts LibreOffice

[Allen Forster]

LibreOffice will not open after CronTab Starts a LibreOffice file.

The only way to recover from this state is not only selecting the shut down command on the Raspberry Pi 4b computer, but also powering it down then powering up again.

I tried CronTab lines with different options like:

 01 */4 * * * libreoffice /home/pi/Desktop/PrgLesson/PrgLessons.ods
 01 */4 * * * display=:0 libreoffice /home/pi/Desktop/PrgLesson/PrgLessons.ods

 01 */4 * * * display=:0 && libreoffice /home/pi/Desktop/PrgLesson/PrgLessons.ods
 01 */4 * * * display=:0.0 && libreoffice /home/pi/Desktop/PrgLesson/PrgLessons.ods

The PrgLessons.ods file launches from a Terminal session or a GUI double click and runs just fine.

I am attached through a HDMI port

CronTab entries like

 @reboot sleep 15 && display=:0 && tvservice -p and -o works just fine.

 01 */4 * * * display=:0.0 && sleep 1 && tvservice -p works just fine.

I searched for this as a bug, but nothing comes up.

Al Forster