NetModem Server Installer Error 1721

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NetModem Server Installer Error 1721

NetModem Server versions 3.33 and 3.34 use a newer version of InstallShield 2008, which had an issue that could prevent an uninstall from occuring.

Under certain conditions, attempting to uninstall or upgrade could result in the following error message:

Error 1721: There is a problem with this Windows Installer Package. A program required for this install to complete could not be run. Contact your support personell or package vendor. Action: Delete_Service.

If you encounter this message, you will need to manually uninstall NetModem Server before upgrading to a newer version by following these steps:

Open a Command Prompt while logged on as an Administrator. If you are running Windows Vista, you will need to open the Command Prompt by right clicking it's icon and select "Run as Administrator".
Type the following line and press enter:
CD "\program files\netmodem\server"
Type the following line and press enter:
netmodemserver -deleteserv
If you typed this correctly, the NetModem Server Tray icon should now vanish.
Type the following line and press enter:
regedit
The Registry Editor window will open.
In RegEdit, Navigate to the following Folder:
HKEY_CURRENT_USER\Software\Microsoft\Installer\Features\
From here, right click on the folder named:
63E03E400EEDBDD4BA2BA6ED06433423
and select Delete, then confirm that you wish to delete this folder.
Next navigate to the following folder::
HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\
From here, right click on the folder named:
63E03E400EEDBDD4BA2BA6ED06433423
and select Delete, then confirm that you wish to delete this folder.
Close the RegEdit Window.
From the Command Prompt Window,( which was opened previously) type the following commands:
erase netmodemserver.exe
erase nmservermon.exe
erase ssleay32.dll
erase libeay32.dll
Close the Command Prompt Window.
You can now reinstall the latest version of NetModem Server, and all your settings will be retained. Versions 3.35 or later will not encounter this issue.