Error: Error 1935: An error occurred during the installation of assembly component

Error Message

This article pertains to ArcGIS versions 9.x. Later versions of ArcGIS may contain different functionality, as well as different names and locations for menus, commands and geoprocessing tools.

When installing ArcGIS Server, ArcGIS Desktop, including ArcView, ArcEditor, ArcInfo; or ArcIMS, the following error message may appear:

"Error 1935: An error occurred during the installation of assembly component {303994BA-6487-47AE-AF1D-7AF6088EEBDB}. HRESULT: -2147024894."

After clicking OK the installation rolls back.


This error occurs during the system update stage of the installation, when Microsoft XML Parser 4.0 installs. The same error may occur when installing Microsoft XML Parser 4.0 by itself.

The cause can vary, but frequently may be caused by system files being used by another product.

Solution or Workaround

Follow the steps below to work around this error.

  1. Stop as many programs as possible. Some programs may be running in the background, such as adware or spyware. If possible, remove them.
  2. Stop as many Windows services as possible by navigating to Control Panel > Administrative Tools > Services.
  3. Verify that Internet Explorer 8.0 or later is installed. Verify that all Microsoft service packs and updates have been installed.
  4. Install Microsoft XML 4.0 SP2 before continuing. The download link is in the Related Links section below.
The previous XML parser may need to be uninstalled before installing XML 4.0 SP2.
  1. Install the Esri software again if Step 4 was successful.

Related Information

Last Published: 10/9/2019

Article ID: 000007626

Software: ArcGIS Image Server 9.3.1, 9.3, 9.2