思科模拟器总是报错需要重进

Question

为什么我的思科模拟器总是报错？每次报错还需要重进..
显示的标题是Cisco Packet Tracer
内容是Packet Tracer has stopped working unexpectedly. Please save adiagnostic (dmp) file, report a bug on Packet Tracer's issuetracking system (http://ptbugs.netacad.net/) with detailedinformation and steps to reproduce, and attach the saveddiagnostic file and log file to the reported bug.
Your default web browser will bring you to PT's issue trackingsystem when you click OK.
Thank you for helping us improve Packet Tracer.
我尝试过重新下载思科，但这个问题并没有解决，我用的是思科6.0版本