Simulating Nios V/g error (cannot compile encrypted .sv file)

I generated the HDL and the testbench files successfully from Platform Designer for my Nios V/g .qsys system.

I am now trying to simulate now in Aldec Riviera-Pro but I am getting the error message when trying to compile the 'niosv_multiplier.sv' file per the 'rivierapro_setup.tcl' script.

It says:

"Error: ELBREAD_0081 niosv_multiplier.sv (89): Design unit protected_043051e22b052bb9119f28a5feab0532 instantiated in work is not found in serached libraries: work, unisims, altera_ver, cycloneive_ver, altera_mf_ver"

Has anyone had trouble compiling the "niosv_multiplier.sv" file? It looks like it is encrypted.

Thanks.