Upgrading a project from Grails 2.1.x to 2.2.x by running a
grails upgrade
you might run into an error of the kind:
| Error Error executing script Upgrade: Could not find matching constructor for: org.codehaus.groovy.grails.compiler.support.GrailsResourceLoader([Lorg.codehaus.groovy.grails.io.support.Resource;) (Use --stacktrace to see the full trace)
Fix is to refresh you dependencies first by running
grails refresh-dependencies.
Hope it helps.
Abou Kone 