现象：
Eclipse IDE for Java Developers Version: Helios Service Release 1，已经安装了epic和padwalker。perl环境装的是activePerl。没有手动设置过系统的参数和Eclipse的参数。
可以正常Run，但是不能Debug。Debug时会出现BEGIN failed--compilation aborted.的错误消息。
Perl 插件EPIC在调试时跳出错误：
Use of uninitialized value in subroutine dereference at (null) line 1.
perl5db.pl did not return a true value.
BEGIN failed--compilation aborted.
弹出一个对话框，里面的信息如下：
Timed out while waiting for Perl debugger connection.
解决方法：
选中perl工程，右键->properties->Perl Include Path,选中Perl的Lib路径加入即可.
http://sourceforge.net/projects/e-p-i-c/forums/forum/258687/topic/3527189
http://www.epic-ide.org/tracker/timed-out-while-waiting-for-perl-debugger.php
http://sourceforge.net/projects/e-p-i-c/forums/forum/258688/topic/2753053
http://topic.csdn.net/u/20110314/18/d4c7fb23-c518-472b-9c2e-9927a23f6863.html
.