可參考原廠技術文件
http://usa.autodesk.com/adsk/servlet/ps/item?siteID=123112&id=7340133&linkID=9240617Issue
When you used the wblock command to block out a drawing or part of a drawing, you received the following (or similar) error message:
Fatal Error: Unhandled Access Violation Reading 0xffffff8 Exception at 655b4a95h
Solution
This issue can be caused by a corrupt Windows Registry or missing registry keys. To correct the problem, reset the value for MRUPathListItemCount to 0.
This value can be found in the following location (this location may vary based on your profile name):
HKEY_CURRENT_USER\Software\Autodesk\AutoCAD\R17.0\ACAD-5001:409\Profiles\<
>\Dialogs\write_block_dialog\
……………………………………………………………………………
解決方案:
此原因可能是Windows登錄檔不正確,可以依下列方法處理
關閉使用中的CAD程式
WINDOWS左下方"開始"--"執行"--輸入"regedit"後點"確定"鍵
找到相關位址
HKEY_CURRENT_USER\Software\Autodesk\AutoCAD\R17.1\ACAD-6001:404\Profiles\<<未具名個案設定>>\Dialogs\write_block_dialog
將裡面的MRUPathListItemCount數值改為 0 ,點"確定"鍵完成設定
關閉登錄檔編輯程式,重新啟動CAD測試看看
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