VCS仿真问题

Chewein

使用vcs仿真，用到了save和restore功能，按照vcs的pdf介绍用了

initial begin

#10

$display("one");

$save("test.chk");

$display("two");

#0 // make the following occur at restart

$display("three");

#10

$display("four");

end

但是restore时候，报了下面错误：

test.chk. OS call open failed with error "No such file or directory" .

        Workaround :[VCS_SAVE_RESTORE] Please check disk space and file/directory permission.

各位大侠能提示问题出在哪了？