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jxProject Problems and Solutions

User Documentation

August 10, 2007


  1. PROBLEM: Prior to August 2007, jxProject used the zerog installer which became problematic for uninstallation. The zerog installer is no longer used but this information is for those that may still have these very old installations that they wish to remove. The problem is that the zerog installer will not uninstall on the Windows platform. When an unistall is attempted, the user gets the following error: java.lang.UnsatisfiedLinkError: com.zerog.ia.platform.Sys.getSpecialFolderJNI(I)Ljava/lang/String

    • CAUSE: The zerog installer used to install jxProject prior to 10-Aug-2007 is a product named “InstallAnywhere Now” produced by zerog software company. Zerog was acquired by another company some years ago and the “InstallAnywhere Now” product is no longer supported. The installer/unistaller is not compatible with Java 1.6 but does work with Java 1.5 and 1.4.

    • SOLUTION(S): The zerog installer is no longer being used so these problems will not exist going forward. However, to remove previous installations, there are a couple of solutions to uninstalling jxProject. They are: 1) Locate an existing version of Java 1.5/1.4 and alter the uninstall configuration file to use it for the uinstall, or 2) Manually delete the files and registry values associated with the install.

    • Solution #1: Uninstalling by linking against Java 1.5/1.4. If you look on your computer under “C:\Program Files\Java” you just might have a Java 1.5 or 1.4 installation sitting there that you can use. It would be a folder like “jre1.5.0_11” or “j2re1.4.2_07”. If you have something like this, then you should use it for the uninstallation. If not, you will need to download and install a Java 1.5 jre at http://www.java.com/getjava or you can try solution #2 for uninstalling.

      • Assuming you now have a suitable JVM. You need to edit the file “C:\Program Files\jxProject_2.5.2.4\UninstallerData\Uninstall jxProject.lax”. The path depends on where you installed jxProject, this is the default location, and the file name will be the same.

      • Edit “Uninstall jxProject.lax”. Find the line in the file like: “lax.nl.current.vm=C:\\Program Files\\Java\\jdk1.6.0_01\\jre\\bin\\java.exe” and change it to point to your 1.5 or 1.4 jvm. For my example above it would be: “lax.nl.current.vm=C:\\Program Files\\Java\\jre1.5.0_11\\bin\\java.exe”. Be sure to use double slashes and that the path is accurate to the java.exe file, otherwise it will not work. Save your changes.

      • Now go to your “add/remove” programs and initiate the uninstall. If you have done this correctly, it will uninstall. If not, check for typos. You can email support for more assistance.

    • Solution #2: Manually uninstalling the files and editing the registry. Extensive testing was performed with a registry monitoring product to record what registry changes the zerog installer was making. The only registry keys being added were similar to: “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\jxProject”. Then of course there were the installed files and any shortcuts that the user requested during installation. The files and shortcuts can be deleted easily, the most difficult part is removing the registry settings.

      • To identify zerog installations, a vbs script is provided to examine the registry and report the location of the zerog installed files(jxpFindOldRegInstallations.vbs). This script does not modify or delete anything, it just examines the registry. You should be able to run this script by downloading it and double clicking it. However, some system administrators disable vb script. So if it won't run, you need to contact your administrator. Hint: If you open a command window and navigate to the directory with the script, you may be able to get it to run by typing: “wscript.exe jxpFindOldRegInstalltions.vbs”.

      • If there are no zerog installations in the registry, the script will pop up a window saying: “End script; No old jxProject installations found in windows registry”. If there are installations found, it will pop up a window for each found installation saying: “Found Old installation in registry ...; You need to manually delete files located at: C\Program Files\...”. You should delete the files at the given location after confirming you no longer want this installation. Then click OK. It will continue finding other installations until you get “End script; found # installation(s)”.

      • Having removed the files at the installation locations identified by the script. Now you can remove the registry keys by running the file(jxpRegDelete2522.reg). This file will remove the registry settings for all old jxProject installations. It is a simple file and will only delete the registry keys that match exactly, otherwise no changes are made. You can run this file by downloading and double clicking it. You can also edit the registry yourself using “regedit” and removing the keys that are identified in the “jxpRegDelete2522.reg” file. But be very careful!. The reg file is by far the safest method to make these registry changes.

      • After completing the registry changes it would be good to run the vbs script again “jxpFindOldRegInstalltions.vbs”. Just to make sure all of the registry entries are gone.

      • The only items remaining will be shortcuts on your desktop or start folders. You can delete these by right clicking on them and selecting “delete”.


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