Due to security reasons, the firewall settings are not modified to support distributed engineering at the installation of the zenOn editor, per default. (other SQL servers might be running on the system which do not allow external access)

In order to be able to work with one project on different PCs, on all PCs the Windows firewall (or any other firewall installed) must be configured to allow traffic to the SQL Server itself (sqlservr.exe) and the SQL browser (sqlbrowser.exe)

In 6.22 a message wil be displayed in the output window, that there is no access to the remote SQL server.