##### Concurrent control

Most of the methods in JReport Designer API can also be used when programming with JReport Server Designer API. There are however, some methods which are unique to JReport Server Designer API. When programming with it, you should use these methods by using the parameters listed in MultiUserCatalogAPI and MultiUserDesigner, which can be found in the Designer Javadoc stored in `<install_root>\help\designer\api`. The methods can be named the same in JReport Designer API and JReport Server Designer API. However, if the methods do not have a parameter UID, they cannot be used in JReport Server Designer API.

Notes:

- The number of concurrent reports and users will depend on your license.
- A user does not mean a person but means a section. Concurrent users mean concurrent sections.
- When using JReport Server Designer API, you must make sure that each user can only edit one report and that each report can only be edited by one user at the same time.
- For details about JReport Server Designer API special methods, see the JReport Designer Javadoc in `<install_root>\help\designer\api`.