Occupational Health - Not Authorised to Edit the Schedule Plan

Dear Experts,

I am trying to add an entry to the medical calendar in the planning cockpit. I can access the calendar, however when I try to select a time for the appointment, I get the following error :

"You are not authorized to edit the schedule plan".

This error occurs when other users of the system try to schedule an appointment as well. I have run an authorization trace but that was not very helpful in troubleshooting this error.

Please advise on how to resolve this issue.

Thanking you in advance for your time and expert knowledge.

Regards

Miss Nash Govender