求助！cfx5.7并行计算时的错误信息

penglu

我在用cfx5.7做并机运算时发生下面的错误： <BR><BR>|                 <STRONG>An error has occurred in cfx5solve</STRONG>: <BR>| Unable to start the PVM daemon on host YTY. This may indicate <BR>| that the PVM daemon is already running on that host, or that it <BR>| left files in /tmp on that host because it did not exit cleanly<BR>| last time it was run. | <BR>+-------------------------------------------------------------------- + <BR>是什么原因，谢谢各位指点迷津！我的邮箱penglu_pl@126.com <BR><BR><BR>