Vivado 下 [Labtoolstcl 44-494] There is no active target available for server at localhost.Targets(s)

Vivado2019.1下連不上Cable USB仿真器。彈窗顯示錯誤[Labtoolstcl 44-494] There is no active target available for server at localhost.Targets(s)   產生原因：因爲我想燒寫ISE，把驅動通過指令方式切換了一下。再回到Vivado下就連不上仿真器了。 D: cd Xilinx\14.6\ISE

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