EDA Simulation Libray Compiler errors when compiling "altera_lnsim_for_vhdl.sv"

[Altera_Forum]

I want to compile simulation libraries for both RTL and gate-level simulation. Errors occur when compiling file "altera_lnsim_for_vhdl.sv" .  

 I am sure that the file does exist. Is there any errors in it?  ModelSim : SE 6.5c Quartus: 11.0 SP1 Full Version  Error Messages:  Error:# ** Error: c:/altera/11.0/quartus/eda/sim_lib/mentor/altera_lnsim_for_vhdl.sv(26): Missing '`pragma protect ????_block encoding' Error:# ** Error: c:/altera/11.0/quartus/eda/sim_lib/mentor/altera_lnsim_for_vhdl.sv(27): Pragma protect keyword expected Error:# ** Error: c:/altera/11.0/quartus/eda/sim_lib/mentor/altera_lnsim_for_vhdl.sv(30): A key_method must be specified. Error:# ** Error: c:/altera/11.0/quartus/eda/sim_lib/mentor/altera_lnsim_for_vhdl.sv(30): near ",": syntax error, unexpected ',', expecting "class" Info:# 1 Info: Library compilation terminated due to error in compilation( D:/modeltech_6.5c/win32/vlog failed. ) Error: Compilation was NOT successful. 4 errors, 0 warnings

[Altera_Forum]

nobody knows?

[Altera_Forum]

just a guess... 

 the file in question contains the line:  `pragma protect encrypt_agent = "Model Technology", encrypt_agent_info = "6.6c"

[Altera_Forum]

I checked the file and found that: 

LINE27: `pragma protect encrypt_agent = "Model Technology", encrypt_agent_info = "6.6c"   ModelSim 6.6c needed.....

[Altera_Forum]

sounds like it