finAccountClients.AddUnknownClient fails with "Key not specified" error

The Business Layer function finAccountClients.AddUnknownClient may fail with a "Key not specified" error.

The following code demonstrates this:

Dim Account As finAccount
  
Account = finBL.CreateAccount()
Account.Clients.AddUnknownClient()

Whilst this error will no longer occur, you should always load the Account Type before calling this function.

Dim Account As finAccount
  
Account = finBL.CreateAccount()
Account.Calculation.LoadAccountType("CC")
Account.Clients.AddUnknownClient()