Modelsim error <protected> - anyone know how to fix it? thanks.

../u_rx_pll/fpa_data_rx_pll_clk_inst/altera_pll_i/<protected>/<protected>/<protected>/<protected>/<protected> File: c:/intelfpga/18.1/quartus/eda/sim_lib/mentor/altera_lnsim_for_vhdl.sv Line: 38