Due to a problem in Modelsim SE version 10.3d, you may see the following error when simulating the Arria® 10 LVDS SERDES IP.
# ** Fatal: Error occurred in protected context. # Time: 0 ns Iteration: 0 Protected: /<hierarchical path to PLL>/<protected>/<protected>/<protected> File: nofile
# FATAL ERROR while loading design # Error loading design
# ** Fatal: Error occurred in protected context.
# Time: 0 ps Iteration: 0 Protected: /lvds_tb/i_lvds_rx/i_lvds_pll_ip/iopll_0/altera_pll_i/<protected>/<protected>/<protected>/<protected> File: nofile
# FATAL ERROR while loading design