DC严重error求助，麻烦大家都帮忙看一下

DC tool严重Error求助！
用装好的DC试了一下，都比较正常
只是在最后，综合完的时候，会报出一个错误，但是仍然可以生成网表
man了一下错误信息，说是要么内存不够，要么网络没通，但是综合的文件很小，然后网络也是好的
请问有人遇到过类似问题吗，如何解决?
错误如下：
ELAPSED   AREA  WORST NEG ...
      TIME                     SLACK
   0.01:18    ....         ..... ...
connect to parent: Connection refused
Information: Child process returned unexpectedly. (PROC-5)
Error: Could not connect to child process. (PROC-3)
Loading db file '.....'
Loading db file '.....'
Optimization Complete
-------------------------------
Warning: Design ....
下面是系统及帮助信息
----------------------------------------------------------------------------------------------
DC:   2007.12 SP5,   linux: RHEL 5.2 i386
----------------------------------------------------------------------------------------------
DC 信息:
dc_shell> man PROC-5
N.   Messages                            Command Reference
                           messages
NAME
       PROC-5 (information) Child process returned unexpectedly.
DESCRIPTION
       The tool has tried to create a child process to help it perform some
       function, and that child process could not properly start up and con-
       nect to its parent. This could be for any one of a number of reasons:
       The system is out of memory, TCP/IP is not installed properly on the
       system, ...
WHAT NEXT
       Check to see if your system has run out of virtual memory (swap space).
       Different systems do this differently, on SUNs use the /etc/pstat -s
       command.
      
       Check to see if TCP/IP is installed properly on your system:
       Try to rlogin localhost
       Try to rlogin 'hostname' (Use backquotes around hostname)
       If either of these commands fail, see you local system administrator
       for further help.
A-2007.12-SP5      Synopsys Inc. 1988-2008. All rights reserved.       n-1
-----------------------------------------------------------------------------------------------
系统信息：
[root@localhost ~]  ping localhost
PING localhost (59.**.**.**) 56(84) bytes of data.
64 bytes from 59.**.**.**: icmp_seq=1 ttl=59 time=12.6 ms
64 bytes from 59.**.**.**: icmp_seq=2 ttl=59 time=11.7 ms
64 bytes from 59.**.**.**: icmp_seq=3 ttl=59 time=11.8 ms
64 bytes from 59.**.**.**: icmp_seq=4 ttl=59 time=12.1 ms
... ...
--- localhost ping statistics ---
9 packets transmitted, 9 received, 0% packet loss, time 8000ms

[root@localhost ~] rlogin localhost
connect to address  ::1 port 543: Connection refused
Trying krb4 rlogin...
connect to address 59.**.**.** port 543: Connection refused
trying normal rlogin (/usr/bin/rlogin)
[root@localhost ~]

环境没设置好吧

这个错我我也经常遇到，时而出现时而消失。搞不懂：-（

11111111......

看不懂······

i got this too...  it seems to be machine dependent.  However, if you diff the netlist produced, they're the same, so I do not worried about it anymore..

沒遇過耶

我也有这个错误 求教

没遇到过

我也遇到了这个错误，解决方法如下：
1.apt-get install tcpstat
2.chmod u+s /bin/ping

觉得可以试试楼上的啊

   请教，这个原理是什么?

    我的上不了网络。不知道第一个语句是什么意思 我打在termal上不好用。

    你解决那个问题了吗?他的意思应该是按照ping协议吧 一般都会有ping协议吧

    您好，我的ping是安装的  但是也报这个问题。不知道是啥问题。