vivado hls 仿真出现下面的错误，怎么解决
时间：10-02
整理：3721RD
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@I [SIM-47] Using Modelsim for RTL simulation.
@e [SIM-104] Cannot find Mentor Graphics ModelSim. Make sure it is accessible through the PATH variable.
@E [SIM-4] *** C/RTL co-simulation finished: FAIL ***
@e [SIM-104] Cannot find Mentor Graphics ModelSim. Make sure it is accessible through the PATH variable.
@E [SIM-4] *** C/RTL co-simulation finished: FAIL ***