Function Entry: VL-UNLOAD-VLX

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Function Entry: VL-UNLOAD-VLX

Name

vl-unload-vlx

Class

VLX namespace control function

Syntax

(vl-unload-vlx appname)

Arguments and Values

  • appname — string naming a VLX application loaded in its own namespace, without the .vlx extension.

Description

Unloads a VLX application that was loaded in a separate namespace.

Return Values

Returns T if successful.

Exceptional Situations

Signals an AutoLISP-visible error if the named application cannot be unloaded.

Notes

  • Autodesk documents that this does not apply to VLX applications loaded into the current document namespace.
  • Recent Autodesk references say the function is supported on macOS and Web but has no effect there because VLX files are Windows-only.

Availability

  • AutoCAD 2026: documented (per Autodesk reference page).
  • AutoCAD 2022: verified present as a SUBR by runtime probe 2026-08-09.
  • BricsCAD V25 and V26: verified present as a SUBR by runtime probe 2026-08-09. The Bricsys DevRef "VLX NameSpace Support" page documents the family as supported since V18.2 (DEScoder v2.7+).
  • Status: verified on both vendors (no longer "presumed compatible"); see chapter 22 § VLX namespace family: verification 2026-08-09.