Use the USEREXT variable to store ArcView extensions in a location other than the Ext32 folder

Last Published: April 25, 2020


Steps to store a personally developed extensions in a location different from the Ext32 folder.


  1. In a text editor, open your startup script (no extension) located under Esri > Av_gis30 > ArcView > Etc.
  2. Scroll to the bottom of the file.
  3. Add the following line of code:

    System.SetEnvVar("USEREXT", "d:\")

    You can replace "d:\" with the location where you want to store your own extensions.

  4. Copy your extension files to the location you defined in the previous step.

    The extensions you place in this new location will be listed in ArcView at the bottom of File > Extensions, and not alphabetized with the ones located in your Ext32 folder.

Article ID:000004600

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