cron can't find recollindex (Big Sur, MacPorts 2.6.4)
On my machine recollindex was installed for some reason by MacPorts 2.6.4 on macOS 11.1 to /opt/local/bin but cron looks for recollindex only in /bin and /usr/bin. I needed to write a small script to source my .bash_profile in the crontab (something like this).