Llian,
To make sure that all elements are reservable and all users got all modifications, do the followings:
1. user No.1: use the "Release All" command (Teamwork menu > Release all)
2. user No.2: use the "Release All" command
3. user No.1: use the "Send & Receive" command
During "release all", if the affected user has unsent changes, there will be a dialog where you can choose "Send & Release All". So after the above steps all elements must be released, and both users must have all modifications.
Otherwise, if you hover the mouse above an element (without clicking on it) a small dialog will appear which will display the teamwork user’s name who reserved the element, this can help you detect if an element is reserved by someone.
Regards,
István
István Moharos
Manager, Technical Services
GRAPHISOFT