I see that the IDE detects errors if I have a URL in a view-id attribute that has a hastag or Seam EL, and does not have any query parameters.

example:
<exception class="org.jboss.seam.security.AuthorizationException" log-level="trace">
<http-error error-code="403"/>
<redirect view-id="/403.xhtml#

{restrictHelper.hashTag}"/>
</exception>


A work around would be to simply use:
<redirect view-id="/403.xhtml?#{restrictHelper.hashTag}

"/>

This is still a valid URL, and does not cause the tooling to show errors.