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During the installation of ArcIMS 4.0.1 the following error is displayed: “C:\WINNT\System32\aimsuninstall.exe could not be opened” and the setup does not proceed with the installation.
It is necessary to completely remove prior versions of ArcIMS prior to the attempted ArcIMS 4.0.1. install. If the prior version was manually removed, or during the process of installing ArcIMS 4.0.1 the setup prompted for uninstalling the previous version and you chose to have it done automatically, not all older version files may have been removed
In some instances, the previous version files might have been uninstalled properly, but the registry entry did not get removed. If this older registry is still present, the new ArcIMS 4.0.1 setup will believe the old version is still installed and try to launch the uninstall program.
For proper installation of a new version, remove ArcIMS 4.0 from the system completely, including the system registry entry for ArcIMS 4.0.
WARNING: This article contains instructions to make specific changes to essential parts of your operating system. If these specific changes are not done correctly, it may cause serious problems to your computer operating system and files. First, ESRI recommends that you make a complete backup of your system, including the registry, before implementing any of the specific changes. It is highly recommended that you consult with your IT/MIS department, or other qualified computer systems professional before proceeding. ESRI cannot guarantee that you can solve problems that result from incorrect use of the Registry Editor utility. Use the Registry Editor utility at your own risk. Note: your operating system and any subsequent service packs may effect these instructions. These instructions are subject to change without notice.