Forum OpenACS Development: Re: ::Users: unabled to dispatch method 'ad_doc' during '::Users ad_doc'

It seems, you are using xotcl-core functions before xotcl-core is loaded. What version of openacs are you using? might be the same problem as described in:
http://alice.wu-wien.ac.at:8000/xowiki-faq/#object_unknown

-gustaf neumann