Environment: Eclipse Oxygen.3a Release (4.7.3a), Build id: 20180405-1200
I have completely developed my new Eclipse Plugin. I have debugged it successfully and It´s ready to be deployed for beta testing by other developers in my organization.
The Overview tab in plugin.xml Eclipse editor offers an Export Wizard that works and produces a .jar file (theoretically) containing the plugin to be installed in other Eclipse installations.
After exporting the plugin to a local folder in my computer I tried to install it in Eclipse by using Help > Install new software... > [Add...] > [Archive...], selecting the .jar file generated and clicking [Ok].
However, I get the error message "Could not find jar:file:*<the selected plugin file>*!" and the [Finnish] button remains disabled.
What is missing to make my new plugin fully installable?
The most robust way to publish a plug-in (or Feature) for others to consume is to produce an Update Site. Then you can direct users to that site so they can install your plug-is/features via the Install New Software UI. It also provides an easy way to publish updates to your plug-ins.