4.3.10. Client/server version mismatch
When in client/server mode, the client application version might differ from the server version. In this case, 1C:Enterprise cannot run. The client and server versions must match exactly.

Fig. 19. Client/server version mismatch
In case of client and server version mismatch, the client application (thin or thick client) searches for and installs the version that matches the server version. The search for distribution packages of the client application is performed in the following order:
- 1C:Enterprise installation directory (specified in InstalledLocation property of 1cestart.cfg and 1cescmn.cfg files).
- Directories specified as locations of distribution packages of new versions (DistributiveLocation property of 1cestart.cfg and 1cescmn.cfg files, as well as CommonCfgLocation property of 1cestart.cfg file).
- URL that is returned in the server version mismatch exception (PublishDistributiveLocation parameter of conf.cfg file and pubdst attribute of ws element in default.vrd file).
- Internet services used to obtain client application distribution packages.
Please keep in mind that:
- Thin client is used to search for and get the distribution package using the Internet services only if you connect to the infobase via HTTP.
- Thin client is used to get the distribution package from the URL specified in the client and server version mismatch exception in any client/server connection.
- If the infobase list (*.v8i file) includes a version that is not available for installation, the latest version available on the computer is used to open the infobase. In this case, the path to distribution package of the required client version can be received from the 1C:Enterprise server.