AR System Message Catalog
ARERR  You do not have write access to the field before the record is saved.
- AR System server
- Server messages and notifications
You do not have write access to this field at create time. This indicates that you do not have general write access to the field, and the create mode of the field is protected. You have access to this field on requests assigned to you (or a group you are a member of) or submitted by you, depending on the permission settings. Because this request does not exist yet, you are not serving in any role yet, so you cannot set the field for this instance during a submit operation.