my os is centos 7 in vmvare .install is ok without errors. when I create test.oct ,and run "rvu -vp 2.25 .375 1 -vd -.25 .125 -.125 -av .5 . 5 .5 test.oct",show a dark window,and soon it break out and show “rvu：cannot open command line window",
how do I do ??