Reusing a connection string

Are we prohibited from connecting to Business One multiple times using the same connection string? Error -7200 (Connection - Connection string doesn't match UI development work mode) is reported when we do so.

To keep the UI responsive, lengthy tasks are performed by another process started by our add-on. This process needs a B1 connection for its UI. A connection attempt using the string passed to the add-on on its command line fails with error -7200.