An error occurred while automatically activating bundle ch.acanda.eclipse.pmd.core about eclipse-pmd HOT 3 CLOSED

I noticed you installed two different PMD plugins: eclipse-pmd and PMD for Eclipse.
PMD for Eclipse uses an older version of PMD which seems to cause trouble with eclipse-pmd.
If you uninstall PMD for Eclipse then this problem should go away.

You can uninstall PMD for Eclipse by selecting "Help > About Eclipse" (Windows) or "Eclipse > About Eclipse" (Mac), then clicking the button "Installation Details". In the tab "Installed Software" search for the plugin "PMD Plugin" with Id "net.sourceforge.pmd.eclipse.feature.group", select it and click on the button "Uninstall...".

Please let me know if this solved your problem.

from eclipse-pmd.

Hi - yes de-installing the PMD for Eclipse removes that exception - I removed both PMD for Eclipse and eclipse-pmd, then I re-added eclipse-pmd. Now I'm in a state where if I try to enable any project in the workspace with PMD, I'm unable to add any rulesets. I've tried every workspace, project, filesystem, nothing works. The dialog always says that the ruleset at whichever location is invalid and I can never click finish. There are no pmd.xml files or .eclipse-pmd files anywhere on the filesystem.

from eclipse-pmd.

You have to create a rule set (pmd.xml) yourself. The PMD website has a page explaining how to make a new rule set. The eclipse-pmd website has step by step instructions of how to set up PMD in Eclipse once you have created the rule set.

from eclipse-pmd.