关于chipscope的问题 很困惑

我在使用chipscope观察自己添加的user IP端口信号的时候在生成system.bit文件时，系统提示下面的错误： ERROR: NgdBuild: 604 - logical block 'chipscope_icon_0/chipscope_icon_0/i_chipscope_icon_0' with type 'chipscope_icon_0' could not be resolved. A pin name misspelling can cause this, a missing edif or ngc file, or the misspelling of a type name. Symbol 'chipscope_icon_0' is not supported in target 'virtex4'. ERROR: NgdBuild: 455 - logical net 'chipscope_ila_0_icon_control<3>' has Multiple driver(s): pin O on block chipscope_ila_0/chipscope_ila_0/i_chipscope_ila_0/U0/I_NO_D.U_ILA/U_DOUT with type LUT3, pin control0<3> on block chipscope_icon_0/chipscope_icon_0/i_chipscope_icon_0 with type chipscope_icon_0

我安装的EDK和chipscope都打上了最新的补丁。然后我新建了一个工程再重新添加一遍，就能生成，所以对这个问题很困惑。肯定指教，谢谢啦！

“logical net 'chipscope_ila_0_icon_control<3>' has Multiple driver(s):”

他说的很明白了哦

你肯定是连接两个以上的输入到这个pin上了。