PROBLEM
When ArcToolbox tools are double-clicked, nothing happens or a brief hourglass appears.
Microsoft XML parser 3.0 Service Pack 4 (SP4) or XML Core Services 4.0 are not installed or have been removed since the installation of ArcGIS 9. This prevents the dialogs from being generated or displayed.
Note:
Even if the XML parser 3.0 and XML Core Services appear to be installed, rerun the install for both of these components; this will replace any files that may be missing or corrupt.
Get help from ArcGIS experts
Download the Esri Support App