在用WINCC和200通讯时，本来已经建立好OPC了。后来我在PCACCESS里面增加变量时不能打开原来的项目了，提示“发生意外错误”？关掉重建一个项目也不行.后面我干脆卸载掉，重装后故障依旧，哪位高手帮忙解答一下啊，谢谢！

附：PC ACCESS错误日志：*** Simatic S7-200 PC Access: Start
*** Instance: D:\Program Files\Siemens\S7-200 PC Access\bin\CoreServer.dll
*** Date: 18. 2.2009
***
16:53:14,203|0BA8* > GlobalInitialize
16:53:14,203|0BA8* < GlobalInitialize
16:53:14,203|0BA8* >DllMain DLL_PROCESS_ATTACH
16:53:14,218|0BA8* <DllMain DLL_PROCESS_ATTACH
16:53:15, 15|0BA8* Result of IComm200 acquisition 【hr=0】
16:53:23,890|04B8* >DllMain DLL_PROCESS_DETACH
16:53:23,890|04B8* > GlobalUninitialize
16:53:23,890|04B8* < GlobalUninitialize
16:53:23,906|04B8* <DllMain DLL_PROCESS_DETACH