I call
var url = BusinessDataContentSource.ConstructStartAddress("BCS", Guid.Empty, "TestLob", "TestLob");
but url is always null.
the bdc application proxy "BCS" exists, as does the lobSystemInstance "TestLob" on the lobSystem "TestLob". The only thing I am unsure about is the partitionId (Guid.Empty) but it's like this in all the examples.
Any ideas what I am doing wrong here?