This type error means you are trying to modify/update an item that is being updated by another process and/or User so you are unable to perform the requested function. Once the process is complete you will be able to perform this function normally.  As intensive update processes can affect other users in your organization, we strongly encourage your organization to run these processes when other users are not accessing eTapestry, such as at the end of the day.  Once started, you may safely log out of eTapestry and the process will continue unattended.