when i am doing the crontab editing i am using the setenv EDITOR /usr/bin/vi
but their was an error i tried to put set EDITOR /usr/bin/vi and it wnet through and i started editing using the command crontab -e but somehow it is slow and displayed something like e300 and i tried to stop because it was slow,by control C and what happened was the next time i display the crontab using crontab -l everything disappeared.

I tried to check the log files for cron then i can see the the cron is running where the cronjobs is activate to the last date i am checking the cron logs.

how can i fix this?

if you have backup somewhere, restore from it

i tried to restore from my backup but when try to display it it doesnt show at all.

Use the crontab command to reinstall the crontab file. Or stop and restart the cron program.