Understanding and Fixing Illegal Access Issues in BIM and AutoCAD

Question:

AutoCAD crashes with a fatal error when performing common tasks such as:

• Closing a drawing.
• Closing multiple drawings.
• Switching from other software to AutoCAD.
• Editing a text box.

The crash produces an error message similar to the following, followed by a Crash Error Report (CER) window:

AutoCAD Error Aborted

Fatal error: Unprocessed illegal access read exception 0xffffff occurred in D2fea7c0h

Possible environment factors:

• Multiple graphics cards installed.

Causes:

• AutoCAD is not configured to use the dedicated graphics card.
• Block objects within the drawing are corrupted.
• The drawing file itself is damaged.
• The computer name contains non-English characters.

Solutions:

To resolve this issue, try one or more of the following steps:

• Configure your system to ensure AutoCAD uses the high-performance graphics card. For detailed instructions, see: How to configure Autodesk software to use high-performance graphics cards.
• Use external references (Xrefs) whenever possible instead of copying and pasting blocks directly into your drawings.
• Externally reference all blocks and unload them when they are not needed to reduce file corruption risks.
• Repair corrupted drawing files. Refer to: How to repair damaged AutoCAD files.
• Rename your computer using English characters only, or disable the Beta version option “Use Unicode UTF-8 to provide global language support.” See: Fatal error when saving, exporting, or using eTransmit in AutoCAD.

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