Qsys- BFM Testbench causing add_connection error

I know this is an old thread, but I have had a similar issue with Quartus 14.0. Basically what I have found is if you try and export a conduit with an associated clock, but which doesn't have an associated reset, the testbench generation will fail. The solution (hack) is to associate a reset with the conduit even if you don't use it - add a dummy reset signal into the hdl file (if not there already) and add a reset (if not there already) to the _hw.tcl file to associate the conduit with. Then it will generate the testbench correctly.