Error when trying to run NIOSII system in Modelsim

Hello,

When I try to launch eclipse in modelsim, I get the following error:

Failed Executing: make sim SPD=C:/AlteraWork/Quartus15_1/RAM/WCTM/simSystem1/ram_wctm_sim1_tb.spd ELF=C:/AlteraWork/Quartus15_1/RAM/WCTM/simSystem1/software/Ram_sim1/RUN_ON_HDL_SIMULATOR_ONLY_Ram_sim1.elf ENABLE_VSIM_GUI=1 VSIM_DIR='C:/altera/15.1/modelsim_ae/win32aloem' return code: 2