WebCenter Content (WCC): intradoc.common.ServiceException: component "Attributes" is missing "version"

WebCenter Content - WCC (previously called as Universal Content Management - UCM  or Enterprise Content Management - ECM) Version : 11.1.1.6.0

Issue: After enabling the Digital Asset Manager in the Component Wizard and restarting the managed servers resulted in WCC page to return error. The WCC login page resulted in  "Error 404 Not Found".

Logfile:
After reviewing the UCM_server1-diagnostic.log  and UCM_server1.log ($DOMAIN_HOME/ucm_domain/servers/UCM_server1/logs), I noticed the following error:

[APP: Oracle Universal Content Management - Content Server] general exception[[
intradoc.common.ServiceException:
        at intradoc.server.ComponentLoader.load(ComponentLoader.java:443)
        at intradoc.server.IdcSystemLoader.initComponentData(IdcSystemLoader.java:497)
        at intradoc.server.IdcSystemLoader.finishInit(IdcSystemLoader.java:366)
        at intradoc.server.IdcSystemLoader.init(IdcSystemLoader.java:335)
        at intradoc.server.IdcServerManager.init(IdcServerManager.java:120)
        at intradoc.idcwls.IdcServletRequestUtils.initializeServer(IdcServletRequestUtils.java:626)
..
..
..
Caused by: intradoc.common.ServiceException: component "Attributes" is missing "version"
        at intradoc.tools.build.ComponentPackager.stampVersion(ComponentPackager.java:268)
        at intradoc.server.ComponentLoader.load(ComponentLoader.java:423)
        at intradoc.server.IdcSystemLoader.initComponentData(IdcSystemLoader.java:498)
        at intradoc.server.IdcSystemLoader.finishInit(IdcSystemLoader.java:367)
        at intradoc.server.IdcSystemLoader.init(IdcSystemLoader.java:335)
        at intradoc.server.IdcServerManager.init(IdcServerManager.java:121)

Solution:

1. Noticed the "Attributes" component were not enabled in Component Wizard, so I enabled it and bounce the managed services. Still I noticed the error and page didn't show up.

2. I followed the metalink referenced below, added the following line to $DOMAIN_HOME/ucm_domain/ucm/cs/custom/Attributes/Attributes.hda and bounced the  Managed Services.

version=2011_11_09(build 1)

Reference:
WCC Startup Shows Error: intradoc.common.ServiceException: component is missing "version" (Doc ID 1459138.1)