In the drools karaf features there is no feature for the jbpm-workitems bundle: https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/drools-osgi/drools-karaf-features/src/main/filtered-resources/repository/features.xml#L116 It would be good to add a feature with this bundle used in the fuse-bxms-integ repository to avoid specify a version, and have the possibility to include a range of versions, as we do for other drools bundles used in the fuse-integ-repository. Take a look: https://github.com/jboss-integration/fuse-bxms-integ/blob/master/karaf/karaf-features/src/main/resources/features.xml#L41
This fix has been already pushed on master with this commit https://github.com/droolsjbpm/droolsjbpm-integration/commit/a6e53b3e96bb6a6a6b5b4d4ae2af8ad8c1f4cd89 and it's requested to cherry-pick this fix to 6.2.x branch.
Feature "jbpm-workitems" is present in BxMS 6.2.0.CR1 "drools-karaf-features" file and it is possible to install it on JBoss Fuse 6.2.1.ER4. The reference on "jbpm-workitems" is used in Integration package (build 1.2.0.redhat-005) feature "jbpm-workitems-camel". I consider this bug as verified.