SJM in crontab

I have a problem when I use SJM in crontab.
It always can not run correctly, and only one line content in Log file like this 
`Fri Nov 15 16:52:01 2019: sjm process ID: 9299`.

So, can you give me some advice about using SJM in crontab?

Thank you in advance.

Looking forward to your reply.