Autocad Exception In Vl.crx Arx Command [BEST]

Guide: Fixing "AutoCAD Exception in vl.crx ARX Command"

5. Font or SHX File Corruption

In some cases, the error appears when AutoCAD tries to generate a font preview or substitute a missing SHX font. Because font handling in AutoCAD involves LISP callbacks, a corrupt font file can cascade into an exception in vl.crx.

When it’s an AutoCAD bug

• If the ARX module is Autodesk-supplied or happens with no third-party ARX, search Autodesk/AutoCAD bug reports for that version/build. Provide a minimal repro case and report to Autodesk Support with exact build/version and steps.

Solution C: Reset AutoCAD to Defaults

If specific configuration files (like acad.lsp in the program folder) are corrupted: autocad exception in vl.crx arx command

1. Reset AutoCAD settings via the Windows Start Menu folder (Autodesk > Reset Settings).
2. Note: This removes user customizations; ensure profiles are exported first.

2. Faulty or Incompatible Third-Party Plugins

Many industry-specific tools (e.g., AutoTURN, Carlson Survey, ProgeCAD plugins, or even older Autodesk verticals) load their own ARX modules. If these modules are: Guide: Fixing "AutoCAD Exception in vl

• Compiled for a different version of AutoCAD.
• Using deprecated functions.
• Competing for the same memory space as vl.crx. ...they can trigger an exception.

4. Remediation Strategies

Once the cause is identified, apply the appropriate fix: If the ARX module is Autodesk-supplied or happens

When All Else Fails: Workarounds

| Workaround | How | |------------|-----| | Avoid Visual LISP functions | Use native AutoLISP only (no vlax-*, vlr-*). | | Port code to .NET (C#) | Rewrite critical functions using Acad.exe + .NET APIs. | | Use script to reload before each run | (if (not vlax-get-acad-object)(vl-load-com)) at start of every function. | | Run LISP in BricsCAD | BricsCAD’s LISP engine often tolerates VLX/FAS better. |