Calibre server fails to start: systemd status=203/EXEC

[noequus]

Hi everyone:

The server is working fine when I start it from the Connect/Share button within Calibre. I would like to have the server run when Calibre is not running and have followed the instructions in the manual here But the server fails to start:

n 14 12:35:49 ktch-12-SD47 systemd[1]: Started calibre Content server.
Jan 14 12:35:49 ktch-12-SD47 systemd[4338]: calibre-server.service: Failed to execute /etc/systemd/system/calibre-server.service: Exec format error
Jan 14 12:35:49 ktch-12-SD47 systemd[4338]: calibre-server.service: Failed at step EXEC spawning /etc/systemd/system/calibre-server.service: Exec format error
Jan 14 12:35:49 ktch-12-SD47 systemd[1]: calibre-server.service: Main process exited, code=exited, status=203/EXEC
Jan 14 12:35:49 ktch-12-SD47 systemd[1]: calibre-server.service: Failed with result 'exit-code'.

Here's the service code I am using, copied from the manual with my user info:

[Unit]
Description=calibre Content server
After=network.target

[Service]
Type=simple
User=pi
Group=pi
ExecStart=/opt/calibre/calibre-server /home/pi/CalibreLibrary

[Install]
WantedBy=multi-user.target

I'm running Calibre 6.11.0 on a Raspberry Pi (Buster) but not familiar with systemd setup...Perhaps something v. simple, thus explaining why I do not find this error on the forum. Thank you for any help,
Gary

[noequus]

Yikes...now I found a thread with the same question....Not sure how I missed that. The response was:

That error means /opt/calibre/calibre-server doesn't exist or the user pi does not have permission to read/execute it.

I don't know what to put into /opt/calibre. I tried putting the calibre-server.service code there but it didn't solve the problem. I'm not familiar with systemd....Suggestions welcome....

[noequus]

Still not sure how my search missed it but problem solved with info in this post...The server was in /usr/bin..

Works now. Thank you!