Thanks. However this is taking too long to fix. My tech help has altered my configuration to not being USB connected Roland to PC/ Cubase and instead use standard 5 pin midi from the Roland to my AudioBox44VSL interface. That way the PC/ Cubase doesn’t see the Roland, and no longer needs to care about 64 bit driver compatibility, Presonus already have 64 bit drivers for the AudioBox.
It works fine and could be a more robust configuration in any case. Cheers.