Invalid class string error when starting Gateway

Resolving The Problem

Run "rhapsody.reg" to resolve this issue.

You should be able to find the rhapsody.reg file in the directory where you installed Rational Rhapsody. Double clicking on this file will make changes to your registry, so it should be run by a user that has permission to change the registry.

Running the rhapsody.reg may not be enough and the following may also be required due to a Rational DOORS 8.3 issue where the registry settings are not present since the DOORS client has not been run as Administrator. On Microsoft Windows XP this is not a problem. However with Microsoft Windows Vista and Microsoft Windows 7, having the UAC enabled can cause the registry settings to not be created.

The first time you run the client, it creates some registry entries. This works under Microsoft Windows XP without any special user access. However, under Microsoft Windows Vista and Microsoft Windows 7 with UAC enabled, the Rational DOORS client has to be launched once with Administrator privileges in order to add the registry entries. This is accomplished by right-clicking the shortcut and selecting "Run as Administrator" from the context menu. It is not necessary to login to the DOORS database. Once the registry entries have been added, special user access is not needed.

If this does not resolve the issue, you may need to reinstall Rational Rhapsody using an administrator account.