Same problem here. I tried to solve it using the start script provided by the plugin and running it with Cron. The script has this estructure:
#!/bin/sh
@$1php -c "/usr/selector/php.ini" -r "define( 'DOING_CRON', TRUE ); require '/blog/path/wp-load.php'; if( class_exists( 'BackWPup_Job' ) ) BackWPup_Job::start_cli( 1 );"
But when I run it, get this error:
/path/to/the/script/BackWPup_cmd_start_job_1.sh: line 2: @php: command not found
Does anyone know how to fix it?