Error: (vsim-3033) nofile(37): Instantiation of 'hps_sdram' failed.

I am simulating a system with HPS,SDRAM and DMA in it. The System is generated in Qsys. When I perform the RTL simulation the Altera_modelsim gives below given error.

##error: (vsim-3033) nofile(37): instantiation of 'hps_sdram' failed. the design unit was not found.

#

# region: /omron_qsys_hps_tb/omron_qsys_hps_inst/hps_0/fpga_interfaces/f2sdram

I have include all the libraries mentioned in the msim_setup.tcl file. Also checked the list of files present in the "Project" tab of Modelsim it contains 'hps_sdram.v' file in it and it is compiling also.

Please let me know how to remove this error.

Thanks

Kushal