You need to change the ANT_HOME entry in Eclipse. Click on the new Eclipse installation (let's say on Linux). Window => Prefrences => Ant (No further). There, select Always run the new Ant configuration in the same JRE as the workspace. Application and assembly should work .
When the workspace changes, this will happen when the Ant installation is different. In my case, I had a workspace for the window and ported to ubuntu. He discovered an old one like C: \ Ant
Once selected above, Ant => Runtime => Claspath (Tab) / opta / sts -bundle will appear, and now this is the correct entry for Ant Home Records (default) You cannot delete this from here, but most likely
Window => Preferences => Ant (No further) There, select Always launch a new Ant configuration in the same JRE as the workspace
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